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Journal articles on the topic 'Drude theory'

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Published: 6 September 2023

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1

Sivan, Yonatan, and Yonatan Dubi. "Theory of “Hot” Photoluminescence from Drude Metals." ACS Nano 15, no. 5 (April 27, 2021): 8724–32. http://dx.doi.org/10.1021/acsnano.1c00835.

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2

Mendoza, Bernardo S., and W. Luis Mochán. "Ab initio theory of the Drude plasma frequency." Journal of the Optical Society of America B 38, no. 6 (May 24, 2021): 1918. http://dx.doi.org/10.1364/josab.416741.

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3

Sivan, Yonatan, and Yonatan Dubi. "Correction to Theory of “Hot” Photoluminescence from Drude Metals." ACS Nano 16, no. 3 (March 2, 2022): 4972. http://dx.doi.org/10.1021/acsnano.2c01666.

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4

Neuhauser, Daniel, and Kenneth Lopata. "Quantum Drude friction for time-dependent density functional theory." Journal of Chemical Physics 129, no. 13 (October 7, 2008): 134106. http://dx.doi.org/10.1063/1.2985650.

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5

Phelan, P. E., M. I. Flik, and C. L. Tien. "Radiative Properties of Superconducting Y-Ba-Cu-O Thin Films." Journal of Heat Transfer 113, no. 2 (May 1, 1991): 487–93. http://dx.doi.org/10.1115/1.2910587.

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Some applications of thin-film high-temperature superconductors, such as bolometers, radiation shielding, and space-cooled electronics, require knowledge of the superconducting-state radiative properties. At present, no general predictive model of the radiative properties has been presented. In this work, reflectance predictions based on two of the major theories of the superconducting state, the classical Drude–London theory and the quantum-mechanical Mattis–Bardeen theory, are compared with the available experimental data to determine the best method for predicting the radiative properties of thin-film Y-Ba-Cu-O. It is seen that the Mattis–Bardeen theory is more successful than the Drude–London theory in predicting the reflectance. Consequently, approximate formulae for the Mattis–Bardeen theory are developed, thus enhancing the theory’s usefulness for engineering calculations.
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6

Tamura, Shun, and Hisatoshi Yokoyama. "Drude and Superconducting Weights and Mott Transitions in Variation Theory." Journal of the Physical Society of Japan 84, no. 6 (June 15, 2015): 064707. http://dx.doi.org/10.7566/jpsj.84.064707.

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7

Tian, Bao-Ling, Jin-Jin Ding, Rui-Xue Xu, and YiJing Yan. "Biexponential theory of Drude dissipation via hierarchical quantum master equation." Journal of Chemical Physics 133, no. 11 (September 21, 2010): 114112. http://dx.doi.org/10.1063/1.3491270.

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8

Ma, Xixiao, Yu Lan, Ling Qin, and Shiping Feng. "Charge dynamics in doped Mott insulators on a honeycomb lattice." Modern Physics Letters B 30, no. 08 (March 30, 2016): 1650107. http://dx.doi.org/10.1142/s0217984916501074.

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Within the framework of the fermion-spin theory, the charge transport in the doped Mott insulators on a honeycomb lattice is studied by taking into account the pseudogap effect. It is shown that the conductivity spectrum in the low-doped regime is separated by the pseudogap into a low-energy non-Drude peak followed by a broad mid-infrared band. However, the decrease of the pseudogap with the increase of doping leads to a shift of the position of the mid-infrared band towards the low-energy non-Drude peak, and then the low-energy Drude behavior recovers in the high-doped regime. The combined results of both the doped honeycomb-lattice and square-lattice Mott insulators indicate that the two-component conductivity induced by the pseudogap is a universal feature in the doped Mott insulators.
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9

Bandyopadhyay, Prasanta, Priya, and Mainak Sadhukhan. "A simple fragment-based method for van der Waals corrections over density functional theory." Physical Chemistry Chemical Physics 24, no. 14 (2022): 8508–18. http://dx.doi.org/10.1039/d2cp00744d.

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A simple method is developed to describe intermolecular van der Waals interactions blending the Drude oscillator with a molecular fragmentation method. The result shows accuracy at par with DFT-D3 method while only using dipole–dipole interactions.
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10

Chanyal, B. C. "Linearized electromagnetic and gravito-Heavisidian chirality in split octonion space-time." International Journal of Geometric Methods in Modern Physics 15, no. 07 (May 24, 2018): 1850109. http://dx.doi.org/10.1142/s0219887818501098.

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In this paper, we construct a split octonionic mathematical approach to generalized electromagnetic and gravito-Heavisidian chirality of dyons by modification of the Drude–Born–Fedorov constitutive relations. In this context, we describe dual Euclidean space-times structure associated with [Formula: see text] Zorn’s vector matrix realization of split octonion. As such, using the Zorn’s vector matrix realization, an alternative form of generalized Proca–Maxwell equations of massive dyons is obtained in chiral media. It is well known that in weak unified gravito-Heavisidian field, the Einstein’s equations become Maxwell-like equations under the first approximation. Thus, we study the gravito-Heavisidian analogous theory to electromagnetic theory, and discuss the Drude–Born–Fedorov constitutive relations, gravito-Heavisidian field, Proca–Maxwell equations and gravito-Heavisidian wave equations for linear gravitational chiral field of gravito-dyons in flat split octonion space-time.
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11

MARACHEVSKY, VALERY N. "THEORY OF THE CASIMIR EFFECT FOR GRAPHENE AT FINITE TEMPERATURE." International Journal of Modern Physics: Conference Series 14 (January 2012): 435–44. http://dx.doi.org/10.1142/s2010194512007556.

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Theory of the Casimir effect for a flat graphene layer interacting with a parallel flat material is presented in detail. The high-temperature asymptotics of a free energy in a graphene-metal system coincides with a Drude high-temperature asymptotics of the metal-metal system. High-temperature behavior in the graphene-metal system is expected at separations of the order of 100 nm at temperature T = 300 K .
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12

Stenzel, Olaf, Steffen Wilbrandt, Sven Stempfhuber, Dieter Gäbler, and Sabrina-Jasmin Wolleb. "Spectrophotometric Characterization of Thin Copper and Gold Films Prepared by Electron Beam Evaporation: Thickness Dependence of the Drude Damping Parameter." Coatings 9, no. 3 (March 9, 2019): 181. http://dx.doi.org/10.3390/coatings9030181.

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Copper and gold films with thicknesses between approximately 10 and 60 nm have been prepared by electron beam evaporation and characterized by spectrophotometry from the near infrared up to the near ultraviolet spectral regions. From near normal incidence transmission and reflection spectra, dispersion of optical constants have been determined by means of spectra fits utilizing a merger of the Drude model and the beta-distributed oscillator model. All spectra could be fitted in the full spectral region with a total of seven dispersion parameters. The obtained Drude damping parameters shows a clear trend to increase with decreasing film thickness. This behavior is discussed in the context of additional non-optical characterization results and turned out to be consistent with a simple mean-free path theory.
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13

Korikov, C. C. "Casimir entropy for ferromagnetic materials." International Journal of Modern Physics A 31, no. 02n03 (January 20, 2016): 1641036. http://dx.doi.org/10.1142/s0217751x16410360.

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We describe recent results concerning the compatibility of the Lifshitz theory of dispersion forces with thermodynamics. It is shown that for ferromagnetic metals described by the plasma model and for ferromagnetic dielectrics with omitted dc conductivity the Lifshitz theory satisfies the Nernst heat theorem. At the same time, for magnetic metals described by the Drude model and for ferromagnetic dielectrics with account of dc conductivity the Nernst heat theorem is violated.
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14

Klimchitskaya, Galina L., Vladimir M. Mostepanenko, and Vitaly B. Svetovoy. "Experimentum crucis for Electromagnetic Response of Metals to Evanescent Waves and the Casimir Puzzle." Universe 8, no. 11 (October 31, 2022): 574. http://dx.doi.org/10.3390/universe8110574.

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It is well known that the Casimir force calculated at large separations using the Lifshitz theory differs by a factor of 2 for metals described by the Drude or plasma models. We argue that this difference is entirely determined by the contribution of transverse electric (s) evanescent waves. Taking into account that there is a lack of experimental information on the electromagnetic response of metals to low-frequency evanescent waves, we propose an experiment on measuring the magnetic field of an oscillating magnetic dipole spaced in a vacuum above a thick metallic plate. According to our results, the lateral components of this field are governed by the transverse electric evanescent waves and may vary by orders of magnitude depending on the model describing the permittivity of the plates used in calculations and the oscillation frequency of the magnetic dipole. Measuring the lateral component of the magnetic field for typical parameters of the magnetic dipole designed in the form of a 1-mm coil, one could either validate or disprove the applicability of the Drude model as a response function of metal in the range of low-frequency evanescent waves. This will elucidate the roots of the Casimir puzzle lying in the fact that the theoretical predictions of the Lifshitz theory using the Drude model are in contradiction with the high-precision measurements of the Casimir force at separations exceeding 150 nm. Possible implications of the suggested experiment for a wide range of topics in optics and condensed matter physics dealing with evanescent waves are discussed.
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15

GRADO-CAFFARO, M. A., and M. GRADO-CAFFARO. "THEORETICAL CHARACTERIZATION OF QUANTUM BALLISTIC CONDUCTION THROUGH MULTIWALLED CARBON NANOTUBES." Modern Physics Letters B 19, no. 19n20 (August 30, 2005): 967–69. http://dx.doi.org/10.1142/s0217984905008979.

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We study, by utilizing analytic techniques, electrical conduction in multiwalled carbon nanotubes. In fact, by using the well-known concept of Fermi velocity and the Drude theory, a mathematical relationship for conductance is derived so that this conductance is found to be quantized. In addition, our results are compared with experimental data.
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16

Wu, You-Lin, Jing-Jenn Lin, and H. L. Kwok. "Modeling the negative capacitance effect in dispersive organic materials using modified Drude theory." Solid State Electronics Letters 1, no. 2 (July 2019): 105–9. http://dx.doi.org/10.1016/j.ssel.2020.01.005.

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17

Lamoureux, Guillaume, and Benoı̂t Roux. "Modeling induced polarization with classical Drude oscillators: Theory and molecular dynamics simulation algorithm." Journal of Chemical Physics 119, no. 6 (August 8, 2003): 3025–39. http://dx.doi.org/10.1063/1.1589749.

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18

Teng, Yunxue, He Gao, Chunsheng Ma, Feng Yuan, and Huaisong Zhao. "The non-Drude type of optical conductivity in cuprates." Modern Physics Letters B 31, no. 18 (June 14, 2017): 1750204. http://dx.doi.org/10.1142/s0217984917502049.

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There is a long-standing issue that the optical conductivity in normal-state of cuprate superconductors deviates the conventional Drude type marked by [Formula: see text] dependence, exhibiting two main components from underdoping to overdoping, a narrow band peaked around zero energy and a broadband centered in the mid-infrared region called mid-infrared band. Within the renormalized t-J model and self-consistent mean field theory, we discuss the doping and energy dependence of optical conductivity in cuprate superconductors. Our results show that the appearance of the pseudogap in normal state is responsible for anomalous optical conductivity, giving rise to the mid-infrared band. In particular, in analogy to the doping dependence of pseudogap, optical conductivity is also strongly doping dependent. By increasing the doping concentration, the spectral weight of the optical conductivity suppressed strongly in underdoped region increases quickly, and the peak position of the mid-infrared band moves towards to the lower energy region, then incorporates into the narrow band centered in zero energy in the heavily overdoped region.
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19

Sarah, Childs, and Lena Krook Mona. "Critical Mass Theory and Women's Political Representation." Political Studies 56, no. 3 (October 2008): 725–36. http://dx.doi.org/10.1111/j.1467-9248.2007.00712.x.

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In studies of women's legislative behaviour, the concept of critical mass is widely used and, more recently, criticised as a tool for understanding the relationship between the percentage of female legislators and the passage of legislation beneficial to women as a group. In this research note, we revisit classic contributions by Rosabeth Moss Kanter and Drude Dahlerup and outline and discuss their assumptions regarding anticipated connections between numbers and outcomes. We find that later gender and politics scholars have often misconstrued their work, with crucial implications for subsequent research on relations between the descriptive and substantive representation of women. We argue that clarifying the theoretical origins of the critical mass concept is crucial for forging a more coherent and cumulative research agenda on women's political representation.
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20

Mostepanenko, Vladimir M. "Casimir Puzzle and Casimir Conundrum: Discovery and Search for Resolution." Universe 7, no. 4 (April 1, 2021): 84. http://dx.doi.org/10.3390/universe7040084.

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This paper provides a review of the complicated problems in Lifshitz theory describing the Casimir force between real material plates composed of metals and dielectrics, including different approaches to their resolution. For both metallic plates with perfect crystal lattices and any dielectric plates, we show that the Casimir entropy calculated in the framework of Lifshitz theory violates the Nernst heat theorem when the well-approved dielectric functions are used in computations. The respective theoretical Casimir forces are excluded by the measurement data of numerous precision experiments. In the literature, this situation has been called the Casimir puzzle and the Casimir conundrum for the cases of metallic and dielectric plates, respectively. This review presents a summary of both the main theoretical and experimental findings on this subject. Next, a discussion is provided of the main approaches proposed in the literature to bring the Lifshitz theory into agreement with the measurement data and with the laws of thermodynamics. Special attention is paid to the recently suggested spatially nonlocal Drude-like response functions, which consider the relaxation properties of conduction electrons, as does the standard Drude model, but lead to the theoretical results being in agreement with both thermodynamics and the measurement data through the alternative response to quantum fluctuations of the mass shell. Further advances and trends in this field of research are discussed.
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21

Yan, Bing, Xiulan Ling, Renxian Li, Jianyong Zhang, and Chenhua Liu. "Optical Force and Torque on a Graphene-Coated Gold Nanosphere by a Vector Bessel Beam." Micromachines 13, no. 3 (March 17, 2022): 456. http://dx.doi.org/10.3390/mi13030456.

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In the framework of the generalized Lorenz–Mie theory (GLMT), the optical force and torque on a graphene-coated gold nanosphere by a vector Bessel beam are investigated. The core of the particle is gold, whose dielectric function is given by the Drude–Sommerfeld model, and the coating is multilayer graphene with layer number N, whose dielectric function is described by the Lorentz–Drude model. The axial optical force Fz and torque Tz are numerically analyzed, and the effects of the layer number N, wavelength λ, and beam parameters (half-cone angle α0, polarization, and order l) are mainly discussed. Numerical results show that the optical force and torque peaks can be adjusted by increasing the thickness of the graphene coating, and can not be adjusted by changing α0 and l. However, α0 and l can change the magnitude of the optical force and torque. The numerical results have potential applications involving the trapped graphene-coated gold nanosphere.
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22

Wolf, N., D. Gerstenlauer, and J. Manara. "Modelling the spectral reflectances of miscellaneous ITO coatings by using only the Drude theory." Journal of Physics: Conference Series 395 (November 26, 2012): 012064. http://dx.doi.org/10.1088/1742-6596/395/1/012064.

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23

Bimonte, Giuseppe, Benjamin Spreng, Paulo A. Maia Neto, Gert-Ludwig Ingold, Galina L. Klimchitskaya, Vladimir M. Mostepanenko, and Ricardo S. Decca. "Measurement of the Casimir Force between 0.2 and 8 μm: Experimental Procedures and Comparison with Theory." Universe 7, no. 4 (April 7, 2021): 93. http://dx.doi.org/10.3390/universe7040093.

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We present results on the determination of the differential Casimir force between an Au-coated sapphire sphere and the top and bottom of Au-coated deep silicon trenches performed by means of the micromechanical torsional oscillator in the range of separations from 0.2 to 8 μm. The random and systematic errors in the measured force signal are determined at the 95% confidence level and combined into the total experimental error. The role of surface roughness and edge effects is investigated and shown to be negligibly small. The distribution of patch potentials is characterized by Kelvin probe microscopy, yielding an estimate of the typical size of patches, the respective r.m.s. voltage and their impact on the measured force. A comparison between the experimental results and theory is performed with no fitting parameters. For this purpose, the Casimir force in the sphere-plate geometry is computed independently on the basis of first principles of quantum electrodynamics using the scattering theory and the gradient expansion. In doing so, the frequency-dependent dielectric permittivity of Au is found from the optical data extrapolated to zero frequency by means of the plasma and Drude models. It is shown that the measurement results exclude the Drude model extrapolation over the region of separations from 0.2 to 4.8 μm, whereas the alternative extrapolation by means of the plasma model is experimentally consistent over the entire measurement range. A discussion of the obtained results is provided.
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24

Reinholz, H. "A Generalised Linear Response Theory applied to the Dielectric Function of Coulomb Systems." Australian Journal of Physics 53, no. 1 (2000): 133. http://dx.doi.org/10.1071/ph99049.

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A generalised linear response theory is used to derive the dielectric function at arbitrary wave numbers k and frequencies w for interacting quantum systems. The connection to thermodynamic Green functions allows the systematic perturbative treatment going beyond RPA and treating local field corrections as well as the inclusion of collisions on the same footing. Emphasis will be on the demonstration of the formalism. Results will be presented for the three-dimensional as well as two-dimensional case of an interacting electron gas. In the long-wavelength limit, a Drude-type expression with frequency dependent relaxation time is given bridging the theories of dielectric function and electrical conductivity.
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25

Ding, Jin-Jin, Jian Xu, Jie Hu, Rui-Xue Xu, and YiJing Yan. "Optimized hierarchical equations of motion theory for Drude dissipation and efficient implementation to nonlinear spectroscopies." Journal of Chemical Physics 135, no. 16 (October 28, 2011): 164107. http://dx.doi.org/10.1063/1.3653479.

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26

Qian, Haoliang, Yuzhe Xiao, Dominic Lepage, Li Chen, and Zhaowei Liu. "Quantum Electrostatic Model for Optical Properties of Nanoscale Gold Films." Nanophotonics 4, no. 4 (November 6, 2015): 413–18. http://dx.doi.org/10.1515/nanoph-2015-0022.

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AbstractThe optical properties of thin gold films with thickness varying from 2.5 nm to 30 nm are investigated. Due to the quantum size effect, the optical constants of the thin gold film deviate from the Drude model for bulk material as film thickness decreases, especially around 2.5 nm, where the electron energy level becomes discrete. A theory based on the self-consistent solution of the Schrödinger equation and the Poisson equation is proposed and its predictions agree well with experimental results.
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27

Du, Yan, Yong Fang Bao, and Yuan Wang. "Research of Epsilon-Negative Material and its Electromagnetic Shielding Effect." Advanced Materials Research 893 (February 2014): 781–89. http://dx.doi.org/10.4028/www.scientific.net/amr.893.781.

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This article discusses the physical theory and mathematical modeling of epsilon-negative (ENG) material. Numerical simulation results are also given in later part of this article, and they prove that this kind of material has a great shielding effect. We mainly focus on the modeling and simulation of one dimensional epsilon-negative (ENG) material. First we set up a Drude model to theoretically simulate ENG material, and then use the finite difference time-domain methods to analyze the electromagnetic wave propagation in our shielding material.
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28

Mendelsberg, Rueben J., Yuankun Zhu, and André Anders. "Determining the nonparabolicity factor of the CdO conduction band using indium doping and the Drude theory." Journal of Physics D: Applied Physics 45, no. 42 (October 1, 2012): 425302. http://dx.doi.org/10.1088/0022-3727/45/42/425302.

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29

Vargas, William E., Marcela Hernández-Jiménez, Victoria Quirós-Cordero, Esteban Avendaño, and Federico Muñoz-Rojas. "Optical, Charge Transport, Thermal, Magnetic, Plasmonic, and Quantum Mechanical Properties of Iridium." Recent Progress in Materials 04, no. 04 (October 12, 2022): 1–29. http://dx.doi.org/10.21926/rpm.2204019.

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Spectrophotometry has been widely used to retrieve the dielectric function of a bulk iridium sample using an extended version of the Drude–Lorentz model. The parameters of the model are optimized using a spectral-projected-gradient-method-assisted acceptance-probability-controlled simulated annealing approach. Furthermore, optimized values of Drude parameters corresponding to the optical response of electrons and holes (scattering frequency of electrons, the ratio between scattering frequencies of holes and electrons, the ratio between effective masses of electrons and holes, the ratio between the number densities of holes and electrons, and electron volume plasma frequency) are used to evaluate charge transport and magnetic properties. These include static and dynamic conductivities, intrinsic mean free paths, the effective mass of charge carriers and their number densities, Fermi velocities and energies, densities of states at Fermi energies, mobilities, specific heats, Hall’s coefficient, thermal conductivities, charge carrier coupling constant, paramagnetic and diamagnetic susceptibilities, and the number of Bohr magnetons. In addition, optimized resonance energy values of the Lorentz contribution to the dielectric function were compared with the background information provided by density-functional-theory calculations for iridium. A decomposition of the energy loss function was used as the starting point to calculate the effective numbers of bound electrons involved in interband transitions, as well as the densities of states at the final energies of the sets of transitions considered. The Drude–Lorentz model involves charge carrier parameters for both electrons and holes, as well as the resonance energies correlating with the energies associated with quantum transitions. To a large extent, several physical quantities calculated from optimized parameters exhibit values close to those obtained from measurements or by applying other models, including quantum mechanics formulations.
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30

CHANG, C. C., A. A. BANISHEV, R. CASTILLO-GARZA, G. L. KLIMCHITSKAYA, V. M. MOSTEPANENKO, and U. MOHIDEEN. "PRECISION MEASUREMENT OF THE CASIMIR FORCE FOR Au USING A DYNAMIC AFM." International Journal of Modern Physics: Conference Series 14 (January 2012): 270–80. http://dx.doi.org/10.1142/s2010194512007398.

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The gradient of the Casimir force between carefully cleaned Au surfaces of a sphere and a plate is measured using a dynamic atomic force microscope in the frequency modulation regime in high vacuum. The electrostatic calibration of the setup did not reveal any effect of patches or surface contaminants. The experimental data for the force gradient are found to be consistent with theory using the plasma model approach over the entire measurement range. The Drude model approach is excluded by the data at separations from 235 to 400 nm at a 67% confidence level.
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31

SONG, YUN. "OPTICAL CONDUCTIVITY AND ORBITAL SUSCEPTIBILITY OF THE TWO-ORBITAL HUBBARD MODEL: EXTENDED LINEARIZED DYNAMICAL MEAN-FIELD THEORY." Modern Physics Letters B 23, no. 19 (July 30, 2009): 2321–29. http://dx.doi.org/10.1142/s0217984909020485.

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We study the optical conductivity and orbital susceptibility of the two-orbital Hubbard model within the extended linearized dynamical mean-field theory. In the orbital-selective Mott phase (OSMP), the optical conductivity of the wide band presents a non-zero Drude peak, while the optical conductivity of the narrow band drops to zero in the lower energy region. It is shown that the OSMP is constrained by the negative crystal-field splitting, while it can survive in the region with positive crystal-field splitting. We also find that the orbital susceptibility presents a reversion at Fermi surface in the OSMP regime, which implies that orbital ordering can coexist with OSMP in two-orbital systems.
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32

Li, Chufeng, Ganesh Subramanian, and John C. H. Spence. "Time-Resolved Spectra from Millivolt EELS Data." Microscopy and Microanalysis 20, no. 3 (May 30, 2014): 837–46. http://dx.doi.org/10.1017/s1431927614000890.

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AbstractThe millivolt energy resolution now obtainable in electron energy-loss spectra (EELS) on the latest monochromated scanning transmission electron microscope corresponds, via the uncertainty principle, to a time range of 414 fs (for 10 meV resolution), and a time resolution of 0.138 fs (for energy range of 30 eV). (Thus, the width of an EELS peak is inversely related to the lifetime of an excitation.) This compares favorably with the latest X-ray free electron lasers. The time evolution of a Drude–Lorentz oscillator may be obtained from an EELS using logarithmic deconvolution followed by Kramers–Kronig analysis to extract the frequency-dependent dielectric function, and a final Fourier transform from frequency to time domain. This time-dependent dielectric function was interpreted as the impulse response of electrons, phonons, or ions based on the Drude–Lorentz theory. The time evolution of electronic oscillators from ice and protein, extracted from low resolution experimental data, were compared. Using higher energy resolution data we have also extracted the time-resolved spectra from excitons in an alkali halide, BaF2. Despite the small scanning transmission electron microscope probe size, delocalization limits the spatial resolution to about 50 nm, which is, nevertheless, better than the millimeter resolution of infrared absorption spectroscopy or Raman spectroscopy.
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33

Burda, Milan, and Ivan Richter. "Nonlocal Hydrodynamic Model with Viscosive Damping and Generalized Drude–Lorentz Term." Photonics 10, no. 8 (August 9, 2023): 913. http://dx.doi.org/10.3390/photonics10080913.

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The response of plasmonic metal particles to an electromagnetic wave produces significant features at the nanoscale level. Different properties of the internal composition of a metal, such as its ionic background and the free electron gas, begin to manifest more prominently. As the dimensions of the nanostructures decrease, the classical local theory gradually becomes inadequate. Therefore, Maxwell’s equations need to be supplemented with a relationship determining the dynamics of current density which is the essence of nonlocal plasmonic models. In this field of physics, the standard (linearized) hydrodynamic model (HDM) has been widely adopted with great success, serving as the basis for a variety of simulation methods. However, ongoing efforts are also being made to expand and refine it. Recently, the GNOR (general nonlocal optical response) modification of the HDM has been used, with the intention of incorporating the influence of electron gas diffusion. Clearly, from the classical description of fluid dynamics, a close relationship between viscosive damping and diffusion arises. This offers a relevant motivation for introducing the GNOR modification in an alternative manner. The standard HDM and its existing GNOR modification also do not include the influence of interband electron transitions in the conduction band and other phenomena that are part of many refining modifications of the Drude–Lorentz and other models of metal permittivity. In this article, we present a modified version of GNOR-HDM that incorporates the viscosive damping of the electron gas and a generalized Drude–Lorentz term. In the selected simulations, we also introduce Landau damping, which corrects the magnitude of the standard damping constant of the electron gas based on the size of the nanoparticle. We have chosen a spherical particle as a suitable object for testing and comparing HD models and their modifications because it allows the calculation of precise analytical solutions for the interactions and, simultaneously, it is a relatively easily fabricated nanostructure in practice. Our contribution also includes our own analytical method for solving the HDM interaction of a plane wave with a spherical particle. This method forms the core of calculations of the characteristic quantities, such as the extinction cross-sections and the corresponding components of electric fields and current densities.
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34

Jensen, Barbara, and Kevin L. Jensen. "The Quantum Mechanical Extension of the Drude Zener Theory and the Optical Constants of an Alpha Semiconductor." Journal of Computational and Theoretical Nanoscience 6, no. 8 (August 1, 2009): 1770–88. http://dx.doi.org/10.1166/jctn.2009.1242.

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35

Huang, Shuiping, Zhanshan Wang, Jian Xu, Daxue Lu, and Tongsuo Yuan. "Determination of optical constants of functional layer of online Low-E glass based on the Drude theory." Thin Solid Films 516, no. 10 (March 2008): 3179–83. http://dx.doi.org/10.1016/j.tsf.2007.08.137.

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36

Akande, A., and S. Sanvito. "Persistent current and Drude weight for the one-dimensional Hubbard model from current lattice density functional theory." Journal of Physics: Condensed Matter 24, no. 5 (January 17, 2012): 055602. http://dx.doi.org/10.1088/0953-8984/24/5/055602.

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37

Akande, A., and S. Sanvito. "Persistent current and Drude weight for the one-dimensional Hubbard model from current lattice density functional theory." Journal of Physics: Condensed Matter 24, no. 9 (February 13, 2012): 099601. http://dx.doi.org/10.1088/0953-8984/24/9/099601.

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38

Антонов, А. В., Д. В. Мастеров, А. Н. Михайлов, С. В. Морозов, С. А. Павлов, А. Е. Парафин, Д. И. Тетельбаум, С. С. Уставщиков, П. А. Юнин, and Д. А. Савинов. "Влияние ионного облучения на электронный транспорт в тонких пленках YBCO." Физика твердого тела 64, no. 9 (2022): 1162. http://dx.doi.org/10.21883/ftt.2022.09.52800.01hh.

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The disorder effect on superconducting properties of thin-film YBCO nanostructures in external magnetic fields is experimentally studied. The disorder was produced by irradiation with xenon ions. The research included transport measurements of narrow bridges based on HTSC YBCO films (thickness 50 nm) in strong magnetic fields (up to 12 T). Thus, for samples with different degrees of disorder, critical dependencies have been studied, i.e. the Hc2(T) phase transition line, the Hirr(T) irreversibility line, etc. The dependences of the mean-free path and critical temperature on the concentration of defects created by ion irradiation have been experimentally studied. The experimental data are described using formulas obtained within the framework of well-known models, such as the Ginzburg-Landau theory, the Drude theory and the Gorkov equations.
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39

Fitriyadi, Azrul Azwar, and Fatimah Arofiati Noor. "The Optical Response of Metallic Spherical Core-Shell Nanoparticles." Journal of Physics: Conference Series 2243, no. 1 (June 1, 2022): 012086. http://dx.doi.org/10.1088/1742-6596/2243/1/012086.

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Abstract The optical response of spherical nanoparticles was studied based on the quasi-static approximation of classical electrodynamics. The simple Drude model was used to calculate the complex dielectric function of the metal. We investigated the behavior of the absorption cross-section spectra of metallic spherical core–shell (including dielectric-metal and metal-dielectric) nanoparticles numerically. We found that the number of resonance peaks in the absorption cross-section spectra depends on the number of metal-dielectric interfaces of the nanostructure, as predicted by plasmonic hybridization theory. Furthermore, the absorption cross-section spectra can be precisely controlled by changing the thickness of the shell and the dielectric constant of the medium.
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40

De Nardis, Jacopo, Benjamin Doyon, Marko Medenjak, and Miłosz Panfil. "Correlation functions and transport coefficients in generalised hydrodynamics." Journal of Statistical Mechanics: Theory and Experiment 2022, no. 1 (January 1, 2022): 014002. http://dx.doi.org/10.1088/1742-5468/ac3658.

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Abstract We review the recent advances on exact results for dynamical correlation functions at large scales and related transport coefficients in interacting integrable models. We discuss Drude weights, conductivity and diffusion constants, as well as linear and nonlinear response on top of equilibrium and non-equilibrium states. We consider the problems from the complementary perspectives of the general hydrodynamic theory of many-body systems, including hydrodynamic projections, and form-factor expansions in integrable models, and show how they provide a comprehensive and consistent set of exact methods to extract large scale behaviours. Finally, we overview various applications in integrable spin chains and field theories.
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41

Sheu, Tony W. H., Y. C. Wang, and J. H. Li. "Development of a 3D staggered FDTD scheme for solving Maxwell’s equations in Drude medium." Computers & Mathematics with Applications 71, no. 6 (March 2016): 1198–226. http://dx.doi.org/10.1016/j.camwa.2016.01.025.

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42

AZARI, ARASH, and MIRFAEZ MIRI. "LATERAL CASIMIR FORCE BETWEEN DEEPLY CORRUGATED DIELECTRIC AND METALLIC PLATES." International Journal of Modern Physics B 26, no. 04 (February 10, 2012): 1250026. http://dx.doi.org/10.1142/s0217979212500269.

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We study the lateral Casimir force between corrugated dielectric plates. We use the dielectric contrast perturbation theory [R. Golestanian, Phys. Rev. Lett.95, 230601, (2005)], which allows us to consider arbitrary deformations with large amplitudes. We consider sinusoidal, rectangular, and sawtooth corrugations, for samples made of silicon and gold. We use the plasma and Drude–Lorentz models for the permittivity of gold and silicon, respectively. For these geometries and materials, the lateral Casimir force is not a sinusoidal function of the relative lateral displacement of plates when the gap between the plates in comparable with the depth of the corrugations. Our results facilitate the design of miniaturized devices based on lateral Casimir forces.
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43

Antonov A. V., Masterov D.V., Mikhaylov A. N., Morozov S. V., Pavlov S.A., Parafin A.E., Tetelbaum D. I., Ustavschikov S.S., Yunin P.A., and Savinov D.A. "Ion-irradiation effect on electron transport in YBCO thin films." Physics of the Solid State 64, no. 9 (2022): 1166. http://dx.doi.org/10.21883/pss.2022.09.54145.01hh.

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The disorder effect on superconducting properties of thin-film YBCO nanostructures in external magnetic fields is experimentally studied. The disorder was produced by irradiation with xenon ions. The research included transport measurements of narrow bridges based on HTSC YBCO films (thickness 50 nm) in strong magnetic fields (up to 12 T). Thus, for samples with different degrees of disorder, critical dependences have been studied, i.e. the Hc2(T) phase-transition line, the Hirr(T) irreversibility line, etc. The dependences of the mean-free path and critical temperature on the concentration of defects created by ion irradiation have been experimentally studied. The experimental data are described using formulas obtained within the framework of well-known models, such as the Ginzburg-Landau theory, the Drude theory, and the Gorkov equations. Keywords: B HTSP, thin films, ion irradiation, defects, resistive measurements, upper critical field, line of irreversibility, vortices.
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44

Fedotov, Alexander K., Sergey L. Prishchepa, Alexander S. Fedotov, Vladzislaw E. Gumennik, Ivan V. Komissarov, Artem O. Konakov, Svetlana A. Vorobyova, Andrei A. Kharchenko, and Oleg A. Ivashkevich. "Effect of cobalt particle deposition on quantum corrections to Drude conductivity in twisted CVD graphene." Modern Electronic Materials 5, no. 4 (December 31, 2019): 165–73. http://dx.doi.org/10.3897/j.moem.5.4.52068.

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Graphene applications in electronics require experimental study of the formation of high-quality Ohmic contacts and deeper understanding of electron transport mechanisms at metal/grapheme contacts. We have studied carrier transport in twisted CVD graphene decorated with electrodeposited Co particles forming Ohmic contacts with graphene layers. We have compared layer resistivity as a function of temperature and magnetic field R�(T, B) for as-synthesized and decorated twisted graphene on silicon oxide substrates. Experiments have proven the existence of negative (induction < 1 Tl) and positive (induction > 1 Tl) contributions to magnetoresistance in both specimen types. The R�(T, B) functions have been analyzed based on the theory of 2D quantum interference corrections to Drude conductivity taking into account competition of hopping conductivity mechanism. We show that for the experimental temperature range (2–300 K) and magnetic field range (up to 8 Tl), carrier transport description in test graphene requires taking into account at least three interference contributions to conductivity, i.e., from weak localization, intervalley scattering and pseudospin chirality, as well as graphene buckling induced by thermal fluctuations.
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45

Akande, Akinlolu, and Stefano Sanvito. "Persistent current and Drude weight of one-dimensional interacting fermions on imperfect ring from current lattice density functional theory." Journal of Physics: Condensed Matter 28, no. 44 (September 8, 2016): 445601. http://dx.doi.org/10.1088/0953-8984/28/44/445601.

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46

DEGIORGI, L. "THE COMPLETE EXCITATION SPECTRUM OF THE ALKALI-METAL-DOPED SUPERCONDUCTING FULLERENES." Modern Physics Letters B 09, no. 08 (April 10, 1995): 445–68. http://dx.doi.org/10.1142/s0217984995000413.

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The electrodynamic response in the normal and superconducting ground states of K 3 C 60 and Rb 3 C 60 is reviewed. The normal state optical properties are rather unconventional since they can be explained only by considering the interplay of a Drude-like and a mid-infrared absorption component. On the other hand, the superconducting state optical properties are more straightforward since they display clear fingerprints related to the conventional weak coupling limit of the BCS ground state. Our optical spectra clearly display a well developed excitation due to the superconducting gap. Moreover, the analysis of our optical results in the superconducting state within the standard Eliashberg electron–phonon theory of superconductivity strongly supports a pairing mechanism mediated by high frequency intramolecular phonon modes.
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47

Schnitzer, Ory, Vincenzo Giannini, Stefan A. Maier, and Richard V. Craster. "Surface plasmon resonances of arbitrarily shaped nanometallic structures in the small-screening-length limit." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2191 (July 2016): 20160258. http://dx.doi.org/10.1098/rspa.2016.0258.

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According to the hydrodynamic Drude model, surface plasmon resonances of metallic nanostructures blueshift owing to the non-local response of the metal’s electron gas. The screening length characterizing the non-local effect is often small relative to the overall dimensions of the metallic structure, which enables us to derive a coarse-grained non-local description using matched asymptotic expansions; a perturbation theory for the blueshifts of arbitrary-shaped nanometallic structures is then developed. The effect of non-locality is not always a perturbation and we present a detailed analysis of the ‘bonding’ modes of a dimer of nearly touching nanowires where the leading-order eigenfrequencies and eigenmode distributions are shown to be a renormalization of those predicted assuming a local metal permittivity.
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48

Qiu, T. Q., J. P. Longtin, and C. L. Tien. "Characteristics of Radiation Absorption in Metallic Particles." Journal of Heat Transfer 117, no. 2 (May 1, 1995): 340–45. http://dx.doi.org/10.1115/1.2822527.

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Thermal radiation absorption in metallic particles is an important phenomenon in many contemporary laser-processing techniques, including laser cladding of coating materials and laser cleaning of particulate contaminations. In this work, the Drude free-electron theory and electromagnetic wave theory are utilized to characterize the internal absorption of CO2 laser radiation in aluminum, chromium, and nickel particles. The results show that metallic particles have unique radiation properties. Radiation absorption in large particles occurs only in a very narrow region of the front particle surface, which results in inefficient radiation absorption. On the other hand, micron and submicron particles can absorb radiation very efficiently, due to the strong diffraction effect at the particle surface. For extremely small particles (e.g., nanometer particles), radiation absorption becomes less efficient. The particle absorption efficiency is found to increase with temperature, and this temperature dependence can be determined from those of flat metal surfaces at the normal incidence.
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49

ZEKRI, LOTFI. "FREQUENCY DEPENDENT EFFECTIVE CONDUCTIVITY OF TWO-DIMENSIONAL METAL–DIELECTRIC COMPOSITES." International Journal of Modern Physics C 16, no. 06 (June 2005): 991–98. http://dx.doi.org/10.1142/s0129183105007662.

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We analyze a random resistor–inductor–capacitor (RLC) lattice model of two-dimensional metal–insulator composites. The results are compared with Bruggeman's and Landauer's Effective Medium Approximations where a discrepancy was observed for some frequency zones. Such a discrepancy is mainly caused by the strong conductivity fluctuations. Indeed, a two-branches distribution is observed for low frequencies. We show also by increasing the system size that at pc the so-called Drude peak vanishes; it increases for vanishing losses.
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50

Konopsky, Valery. "Design of 1D Photonic Crystals Sustaining Optical Surface Modes." Coatings 12, no. 10 (October 6, 2022): 1489. http://dx.doi.org/10.3390/coatings12101489.

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An impedance approach has been implemented to design truncated 1D photonic crystals, sustaining optical surface modes, with any predetermined wavelength and wavevector. The implementation is realized as a free Windows program that calculates both the thicknesses of the double layers and the thickness of the final truncated layer at given refractive indices of the layers. The dispersion of the refractive indices can be given in the form of the Sellmeier/Drude formulas or in the form of a wavelength-n-k table. For mixed layers, the Maxwell Garnett theory can be used. This approach is suitable for studying and visualizing the field distribution inside photonic crystals, dispersion, and other aspects of the designed structures that sustain optical surface modes. Therefore, this program should promote scientific development and implementation of practical applications in this area.
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