Bibliografías temáticas / Electron electron interactions

Literatura académica sobre el tema "Electron electron interactions"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 29 de julio de 2024

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Artículos de revistas sobre el tema "Electron electron interactions"

1

Ram, Abhay K., Kyriakos Hizanidis y Richard J. Temkin. "Current drive by high intensity, pulsed, electron cyclotron wave packets". EPJ Web of Conferences 203 (2019): 01009. http://dx.doi.org/10.1051/epjconf/201920301009.

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The nonlinear interaction of electrons with a high intensity, spatially localized, Gaussian, electro-magnetic wave packet, or beam, in the electron cyclotron range of frequencies is described by the relativistic Lorentz equation. There are two distinct sets of electrons that result from wave-particle interactions. One set of electrons is reflected by the ponderomotive force due to the spatial variation of the wave packet. The second set of electrons are energetic enough to traverse across the wave packet. Both sets of electrons can exchange energy and momentum with the wave packet. The trapping of electrons in plane waves, which are constituents of the Gaussian beam, leads to dynamics that is distinctly different from quasilinear modeling of wave-particle interactions. This paper illustrates the changes that occur in the electron motion as a result of the nonlinear interaction. The dynamical differences between electrons interacting with a wave packet composed of ordinary electromagnetic waves and electrons interacting with a wave packet composed of extraordinary waves are exemplified.
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2

Salma, Khanam y Z. J. Ding. "Surface Boundary Effect in Electron-Solid Interactions". Solid State Phenomena 121-123 (marzo de 2007): 1175–80. http://dx.doi.org/10.4028/www.scientific.net/ssp.121-123.1175.

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Electrons impinging or escaping from a solid surface undergo surface electronic excitations which are competitive in nature to other electron-solid interaction channels. The detailed information about electron inelastic scattering probability for surface excitations at solid surface is also important in reflection electron energy loss spectroscopy. A self energy formalism based on quantum mechanical treatment of interaction of electrons with a semi-infinite medium, which uses the optical dielectric function is considered to study surface boundary effect for planar surfaces of Cu and Ni for various conditions of electron-solid interactions. The total surface excitation probability of an electron while crossing the surface boundary once is numerically computed by integrating surface term of spatial and angular dependent differential inelastic cross sections over energy loss and distance from the surface. It is found that surface effect is prominent for low energy electrons and large oblique angles with respect to surface normal and confined to the close vicinity of surface boundary.
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Yang, Yujia, Jan-Wilke Henke, Arslan S. Raja, F. Jasmin Kappert, Guanhao Huang, Germaine Arend, Zheru Qiu et al. "Free-electron interaction with nonlinear optical states in microresonators". Science 383, n.º 6679 (12 de enero de 2024): 168–73. http://dx.doi.org/10.1126/science.adk2489.

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The short de Broglie wavelength and strong interaction empower free electrons to probe structures and excitations in materials and biomolecules. Recently, electron-photon interactions have enabled new optical manipulation schemes for electron beams. In this work, we demonstrate the interaction of electrons with nonlinear optical states inside a photonic chip–based microresonator. Optical parametric processes give rise to spatiotemporal pattern formation corresponding to coherent or incoherent optical frequency combs. We couple such “microcombs” to electron beams, demonstrate their fingerprints in the electron spectra, and achieve ultrafast temporal gating of the electron beam. Our work demonstrates the ability to access solitons inside an electron microscope and extends the use of microcombs to spatiotemporal control of electrons for imaging and spectroscopy.
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4

Mahan, G. D. y L. M. Woods. "Phonon-modulated electron-electron interactions". Physical Review B 60, n.º 8 (15 de agosto de 1999): 5276–81. http://dx.doi.org/10.1103/physrevb.60.5276.

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MAHAN, G. D. "ELECTRON-ELECTRON INTERACTIONS: WARD IDENTITIES". International Journal of Modern Physics B 06, n.º 20 (20 de octubre de 1992): 3381–94. http://dx.doi.org/10.1142/s0217979292001493.

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6

Ramasesha, S. "Electron-electron interactions in polyacetylene". Journal of Chemical Sciences 96, n.º 6 (abril de 1986): 509–21. http://dx.doi.org/10.1007/bf02936302.

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Finkel'stein, Alexander M. "DISORDERED ELECTRON LIQUID WITH INTERACTIONS". International Journal of Modern Physics B 24, n.º 12n13 (20 de mayo de 2010): 1855–94. http://dx.doi.org/10.1142/s0217979210064642.

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The metal–insulator transition (MIT) observed in a two-dimensional dilute electron liquid raises the question about the applicability of the scaling theory of disordered electrons, the approach pioneered by Phil Anderson and his collaborators,8 for the description of this transition. In this context, we review here the scaling theory of disordered electrons with electron–electron interactions. We start with the disordered Fermi liquid, and show how to adjust the microscopic Fermi-liquid theory to the presence of disorder. Then we describe the non-linear sigma model (NLSM) with interactions. This model has a direct relation with the disordered Fermi liquid, but can be more generally applicable, since it is a minimal model for disordered interacting electrons. The discussion is mostly about the general structure of the theory emphasizing the connection of the scaling parameters entering the NLSM with conservation laws. Next, we show that the MIT, as described by the NLSM with interactions, is a quantum phase transition and identify the parameters needed for the description of the kinetics and thermodynamics of the interacting liquid in the critical region of the transition. Finally, we discuss the MIT observed in Si -MOSFETs. We consider it as an example of the Anderson transition in the presence of the electron interactions. We demonstrate that the two-parameter RG equations, which treat disorder in the one-loop approximation but incorporate the full dependence on the interaction amplitudes, describe accurately the experimental data in Si -MOSFETs including the observed non-monotonic behavior of the resistance and its strong drop at low temperatures. The fact that this drop can be reproduced theoretically, together with the argument that Anderson localization should occur at strong disorder, justified the existence of the MIT within the scaling theory.
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8

Knyazev, D. A., O. E. Omelyanovskii y V. M. Pudalov. "Electron–electron interactions in the 2D electron system". Solid State Communications 144, n.º 12 (diciembre de 2007): 518–20. http://dx.doi.org/10.1016/j.ssc.2007.03.059.

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9

Rösch, O., J. E. Han, O. Gunnarsson y V. H. Crespi. "Interplay between electron-phonon and electron-electron interactions". physica status solidi (b) 242, n.º 1 (enero de 2005): 118–32. http://dx.doi.org/10.1002/pssb.200404954.

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10

KOO, JE HUAN y GUANGSUP CHO. "METALLIC FERROMAGNETISM DRIVEN BY PHONON-ENHANCED SPIN FLUCTUATIONS". International Journal of Modern Physics B 21, n.º 06 (10 de marzo de 2007): 857–69. http://dx.doi.org/10.1142/s021797920703676x.

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We investigate the metallic ferromagnetism for materials with incomplete 3d-orbitals. The ferromagnetism occurs in electrons of s-orbitals by phonon-enhanced spin flippings of d-electrons via s-d exchange interactions, which was discussed by us [Phys. Rev. B61, 4289 (2000)]. We know the electron-electron interaction, U sd , mediated by phonon-enhanced spin flippings is repulsive for metallic ferromagnetic materials but attractive for high transition temperature superconductors (HTSC). The electron-electron interaction, U sd , is an order of magnitude stronger than that by Kondo-type bare spin-flippings. We elucidate non-occurrence of ferromagnetism in Pd even though it has very strong exchange interactions. We also show that the charge sum rule is recovered in the case of inclusion of U sd . We calculate the resistivity in normal states.
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Tesis sobre el tema "Electron electron interactions"

1

Foley, Simon Timothy. "Effects of electron-electron interactions on electronic transport in disordered systems". Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273932.

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Sergueev, Nikolai. "Electron-phonon interactions in molecular electronic devices". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102171.

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Over the past several decades, semiconductor electronic devices have been miniaturized following the remarkable "Moores law". If this trend is to continue, devices will reach physical size limit in the not too distance future. There is therefore an urgent need to understand the physics of electronic devices at nano-meter scale, and to predict how such nanoelectronics will work. In nanoelectronics theory, one of the most important and difficult problems concerns electron-phonon interactions under nonequilibrium transport conditions. Calculating phonon spectrum, electron-phonon interaction, and their effects to charge transport for nanoelectronic devices including all atomic microscopic details, is a very difficult and unsolved problem. It is the purpose of this thesis to develop a theoretical formalism and associated numerical tools for solving this problem.
In our formalism, we calculate electronic Hamiltonian via density functional theory (DFT) within the nonequilibrium Green's functions (NEGF) which takes care of nonequilibrium transport conditions and open device boundaries for the devices. From the total energy of the device scattering region, we derive the dynamic matrix in analytical form within DFT-NEGF and it gives the vibrational spectrum of the relevant atoms. The vibrational spectrum together with the vibrational eigenvector gives the electron-phonon coupling strength at nonequilibrium for various scattering states. A self-consistent Born approximation (SCBA) allows one to determine the phonon self-energy, the electron Green's function, the electronic density matrix and the electronic Hamiltonian, all self-consistently within equal footing. The main technical development of this work is the DFT-NEGF-SCBA formalism and its associated codes.
A number of important physics issues are studied in this work. We start with a detailed analysis of transport properties of C60 molecular tunnel junction. We find that charge transport is mediated by resonances due to an alignment of the Fermi level of the electrodes and the lowest unoccupied C60 molecular orbital. We then make a first step toward the problem of analyzing phonon modes of the C60 by examining the rotational and the center-of-mass motions by calculating the total energy. We obtain the characteristic frequencies of the libration and the center-of-mass modes, the latter is quantitatively consistent with recent experimental measurements. Next, we developed a DFT-NEGF theory for the general purpose of calculating any vibrational modes in molecular tunnel junctions. We derive an analytical expression for dynamic matrix within the framework of DFT-NEGF. Diagonalizing the dynamic matrix we obtain the vibrational (phonon) spectrum of the device. Using this technique we calculate the vibrational spectrum of benzenedithiolate molecule in a tunnel junction and we investigate electron-phonon coupling under an applied bias voltage during current flow. We find that the electron-phonon coupling strength for this molecular device changes drastically as the bias voltage increases, due to dominant contributions from the center-of-mass vibrational modes of the molecule. Finally, we have investigated the reverse problem, namely the effect of molecular vibrations on the tunneling current. For this purpose we developed the DFT-NEGF-SCBA formalism, and an example is given illustrating the power of this formalism.
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3

Sica, G. "Electron-electron and electron-phonon interactions in strongly correlated systems". Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12194.

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In this work we investigate some aspects of the physics of strongly correlated systems by taking into account both electron-electron and electron-phonon interactions as basic mechanisms for reproducing electronic correlations in real materials. The relevance of the electron-electron interactions is discussed in the first part of this thesis in the framework of a self-consistent theoretical approach, named Composite Operator Method (COM), which accounts for the relevant quasi-particle excitations in terms of a set of composite operators that appear as a result of the modification imposed by the interactions on the canonical electronic fields. We show that the COM allows the calculation of all the relevant Green s and correlation functions in terms of a number of unknown internal parameters to be determined self-consistently. Therefore, depending on the balance between unknown parameters and self-consistent equations, exact and approximate solutions can be obtained. By way of example, we discuss the application of the COM to the extended t-U-J-h model in the atomic limit, and to the two-dimensional single-band Hubbard model. In the former case, we show that the COM provides the exact solution of the model in one dimension. We study the effects of electronic correlations as responsible for the formation of a plethora of different charge and/or spin orderings. We report the phase diagram of the model, as well as a detailed analysis of both zero and finite temperature single-particle and thermodynamic properties. As far as the single-band Hubbard model is concerned, we illustrate an approximated self-consistent scheme based on the choice of a two-field basis. We report a detailed analysis of many unconventional features that arise in single-particle properties, thermodynamics and system's response functions. We emphasize that the accuracy of the COM in describing the effects of electronic correlations strongly relies on the choice of the basis, paving the way for possible multi-pole extensions to the two-field theory. To this purpose, we also study a three-field approach to the single-band Hubbard model, showing a significant step forward in the agreements with numerical data with respect to the two-pole results. The role of the electron-phonon interaction in the physics of strongly correlated systems is discussed in the second part of this thesis. We show that in highly polarizable lattices the competition between unscreened Coulomb and Fröhlich interactions results in a short-range polaronic exchange term Jp that favours the formation of local and light pairs of bosonic nature, named bipolarons, which condense with a critical temperature well in excess of hundred kelvins. These findings, discussed in the framework of the so-called polaronic t-Jp model, are further investigated in the presence of a finite on-site potential U, coming from the competition between on-site Coulomb and Fröhlich interactions. We discuss the role of U as the driving parameter for a small-to-large bipolaron transition, providing a possible explanation of the BEC-BCS crossover in terms of the properties of the bipolaronic ground state. Finally, we show that a hard-core bipolarons gas, studied as a charged Bose-Fermi mixture, allows for the description of many non Fermi liquid behaviours, allowing also for a microscopic explanation of pseudogap features in terms of a thermal-induced recombination of polarons and bipolarons, without any assumption on preexisting order or broken symmetries.
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4

Sica, Gerardo. "Electron-electron and electron-phonon interactions in strongly correlated systems". Doctoral thesis, Universita degli studi di Salerno, 2013. http://hdl.handle.net/10556/1418.

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2011 - 2012
In this work we investigate some aspects of the physics of strongly correlated systems by taking into account both electron-electron and electron-phonon interactions as basic mechanisms for reproducing electronic correlations in real materials. The relevance of the electron-electron interactions is discussed in the first part of this thesis in the framework of a self-consistent theoretical approach, named Composite Operator Method (COM), which accounts for the relevant quasi-particle excitations in terms of a set of composite operators that appear as a result of the modification imposed by the interactions on the canonical electronic fields. We show that the COM allows the calculation of all the relevant Green’s and correlation functions in terms of a number of unknown internal parameters to be determined self-consistently. Therefore, depending on the balance between unknown parameters and self-consistent equations, exact and approximate solutions can be obtained. By way of example, we discuss the application of the COM to the extended t-U- J-h model in the atomic limit, and to the two-dimensional single-band Hubbard model. In the former case, we show that the COM provides the exact solution of the model in one dimension. We study the effects of electronic correlations as responsible for the formation of a plethora of different charge and/or spin orderings. We report the phase diagram of the model, as well as a detailed analysis of both zero and finite temperature single-particle and thermodynamic properties. As far as the single-band Hubbard model is concerned, we illustrate an approximated selfconsistent scheme based on the choice of a two-field basis. We report a detailed analysis of many unconventional features that arise in single-particle properties, thermodynamics and system’s response functions. We emphasize that the accuracy of the COM in describing the effects of electronic correlations strongly relies on the choice of the basis, paving the way for possible multi-pole extensions to the twofield theory. To this purpose, we also study a three-field approach to the single-band Hubbard model, showing a significant step forward in the agreements with numerical data with respect to the two-pole results. The role of the electron-phonon interaction in the physics of strongly correlated systems is discussed in the second part of this thesis. We show that in highly polarizable lattices the competition between unscreened Coulomb and Fröhlich interactions results in a short-range polaronic exchange term Jp that favours the formation of local and light pairs of bosonic nature, named bipolarons, which condense with a critical temperature well in excess of hundred kelvins. These findings, discussed in the framework of the so-called polaronic t-Jp model, are further investigated in the presence of a finite on-site potential ~U , coming from the competition between on-site Coulomb and Fröhlich interactions. We discuss the role of ~U as the driving parameter for a small-to-large bipolaron transition, providing a possible explanation of the BEC-BCS crossover in terms of the properties of the bipolaronic ground state. Finally, we show that a hard-core bipolarons gas, studied as a charged Bose-Fermi mixture, allows for the description of many non Fermi liquid behaviours, allowing also for a microscopic explanation of pseudogap features in terms of a thermal-induced recombination of polarons and bipolarons, without any assumption on preexisting order or broken symmetries. [edited by author]
XI n.s.
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5

Ren, Yan-Ru. "Orbital spin-splitting factors for conduction electrons in lead". Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25961.

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A detailed experimental study has been made of the spin-splitting factors ℊc for magnetic Landau levels associated with conduction electrons in extremal orbits on the Fermi surface of lead. This information has been derived from the waveform of the de Haas-van Alphen (dHvA) quantum oscillations in the magnetization of single-crystal lead spheres at temperatures of about 1.2 K and with applied magnetic fields in the range 50-75 kG. A commercial spectrum analyzer has been used to provide on-line values of the harmonic amplitudes in the dHvA waveform, and the values of ℊc have been extracted from the relative strengths of the harmonics. Serious systematic errors in ℊc can arise on account of waveform distortions caused by the small and subtle difference between the externally applied field H and the magnetizing field B acting on the conduction electrons. In 1981 Gold and Van Schyndel demonstrated that these 'magnetic-interaction' distortions could be suppressed to a large extent by using negative magnetic feedback to make the induction B within the sample be the same as H (or very nearly so). This thesis describes the first in-depth application of the magnetic-feedback technique to the systematic study of any metal. Particular attention has been paid to the effect of sample inhomogeneity, and Shoenberg's treatment of the magnetic interaction in a non-uniform sample has been generalized to include magnetic feedback. This theory accounts well for many features in the experimental data, especially those which remained a puzzle in the earlier work of Gold and Van Schyndel. Experimental ℊc values are given for the first time for most of the extremal orbits on the lead Fermi surface and for high-symmetry directions of the magnetic field. Indeed these are the most detailed data reported for any polyvalent metal. The ℊc factors for the different orbits and field directions are found to span the range from 0.56 to 1.147. These large net deviations from the free-electron value ℊ₀ = 2.0023 are consequences of the strong spin-orbit and electron-phonon interactions, and an attempt has been made to separate these two contributions to the ℊ-shifts.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
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6

Chen, T. M. "Electron-electron interactions in GaAs quantum wires". Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597526.

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The first experiment presents a novel method for continuously tracking the energies of the 1D subbands as a function of carrier density. I show a peculiar dc conductance feature in the region where the so-called 0.85(2e2/h) plateau in differential conductance is observed, directly demonstrating the pinning effect of the energy level of the minority spin-up electrons. A model concerning providing for non-linear population of the 1D subband with dc bias is proposed to explain the unusual differential conductance value of the 0.85(2e2/h) plateau. The second experiment shows that a fully spin-polarised current, consisting of a single spin-type only, can be created without external magnetic fields. When a source-drain bias lifts the momentum degeneracy, the dc measurements show that it is possible to achieve a unidirectional transport with a ferromagnetic order and this ordered spin array is destroyed once transport in both directions commences. The degree of spin polarisation of currents, between full spin polarisation, partial spin polarisation, and spin degeneracy, is thus simply controlled by source-drain bias and split-gate voltage, something of considerable value for spintronics. I then present four odd-even spin phenomena in the third experiment, showing clear evidence that a quasi-one-dimensional system tends to spontaneous spin polarisation with the energy band of minority spin-up electrons being reluctant to populate, thus widening the energy gap between two spin types. Variation of g-factor within a single subband is measured using a dc conductance technique, showing the g-factor oscillates as the 1D subbands are filled one by one with increasing carrier density. The last experiment introduces new experimental data of the zero-bias anomaly (ZBA), showing clear evidence that the ZBA observed in quantum wires in fact has a different origin from the Kondo effect seen in quantum dots. I propose a phenomenological model wherein the zero-bias anomaly in 1D quantum wires is in fact attributed to a upward shift of the 1D subband energy with source-drain bias.
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7

Pierre, Frédéric. "Interactions electron-electron dans les fils mesoscopiques". Paris 6, 2000. http://www.theses.fr/2000PA066375.

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Les interactions electron-electron limitent la coherence quantique des electrons dans les metaux et leur permettent d'atteindre l'equilibre thermique a basse temperature. Ces interactions sont faibles car les electrons dans les metaux sont etroitement ecrantes par la polarisation qu'ils induisent dans le milieu forme par les autres electrons. Dans le regime mesoscopique, on s'attend a ce que les chocs elastiques sur les defauts du reseau, les bords du metal et les impuretes diminuent l'efficacite de l'ecrantage et donc augmentent les interactions. L'objet de cette these est precisement de determiner experimentalement la nature des interactions inelastiques subies par les electrons a basse temperature dans les fils mesoscopiques. Dans la premiere partie, nous presentons la mesure du taux avec lequel les electrons echangent de l'energie dans des fils d'argent, de cuivre et d'or. Pour cela, nous mesurons la fonction de distribution en energie des electrons dans un regime stationnaire hors-equilibre. Dans la deuxieme partie, nous presentons la mesure du temps de coherence de phase des electrons en fonction de la temperature, egalement dans des fils de cuivre d'or et d'argent. La coherence quantique des electrons est limitee par toutes les collisions inelastiques independamment de l'energie echangee. Nous avons deduit le temps de coherence de phase de la mesure des corrections de localisation faible a la conductance des fils. Dans la troisieme partie, nous presentons des mesures de l'anomalie de conductance aux petites tensions d'une longue jonction tunnel entre un fil d'aluminium et un plan de masse. Cette depression de la conductance tunnel est un autre effet de l'interaction coulombienne. Pour comparer mesures et predictions theoriques, nous avons reformule les predictions du calcul microscopique des interactions entre electrons en terme d'impedance electromagnetique, dans un langage similaire a celui utilise par la theorie phenomenologique du blocage de coulomb.
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Phinney, Isabelle Y. "Probing electron-electron and electron-phonon interactions in twisted bilayer graphene". Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127092.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 81-86).
Two-dimensional systems, and, most recently, moire systems, have risen to the forefront of condensed matter physics with the advent of experimental techniques that allow for controlled stacking of van der Waals heterostructures [17, 54]. For example, it was recently discovered that when two pieces of atomically thin carbon (graphene) are twisted at 1.1° with respect to one another, they display a variety of effects, including superconducting behavior [10]. Experimental investigation of the behavior of small-angle twisted bilayer graphene (SA-TBG) as a function of twist angle is imperative to understanding the mechanisms that play into the many interesting, strongly-interacting phenomena that the moire system displays. In this thesis, I present three experiments which explore electron-electron and electron-phonon interactions in SA-TBG. I first consider SA-TBG as a host for a viscous electron fluid and look for the onset of fluid behavior via electron transport. Then I investigate the temperature dependence of resistivity in SA-TBG devices at a number of angles. The final experiment examines magnetophonons in three devices above the magic angle and compares the findings to theoretical results.
by Isabelle Y. Phinney.
S.B.
S.B. Massachusetts Institute of Technology, Department of Physics
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9

Bassett, L. C. "Probing electron-electron interactions with a quantum antidot". Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596454.

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In the integer quantum Hall (IQH) regime, an antidot provides a finite, controllable ‘edge’ of quantum Hall fluid which is an ideal laboratory for investigating the collective dynamics of large numbers of interacting electrons. Transport measurements of single antidotes probe the orbital energy spectra of the antidot edge, and gate-defined antidot devices offer the flexibility to vary both the dimensions of the antidot and the couplings to the extended IQH edge modes which serve as leads. We can also use the spin-selectivity of the IQH edge modes to perform spin-resolved transport measurements, from which we can infer the antidot spin-structure. This thesis describes a combination of such experimental measurements and related computational models designed to investigate the effects of electron-electron interactions in quantum antidotes, with general implications for the physics of spin and charge in IQH systems. Our work provides a powerful example of the practical applications of IQH edge modes for selective transport in mesoscopic quantum electronics, which we have used to perform the first spin-resolved measurements of VAD = 2 transmission resonances. Our discovery of spin-charge separation in the low-field antidot excitation spectrum paints a picture of the antidot as a finite droplet of interacting IQH fluid in the LLL, with all of the rich physics of exchange, collective modes, spin textures, etc., which this entails. Our results are therefore relevant not only for the physics of antidots, but more broadly for the understanding of interacting electronic systems of many particles in the IQH regime.
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10

Ung, Kim-Chau. "Effects of electron-electron and electron-phonon interactions in narrow-band systems". Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186622.

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Different ordered states, CDW, BOW, and SDW, are investigated theoretically for both interacting and noninteracting cases as well as for different band filling systems. For noninteracting case, we find that the BOW is always accompanied by the CDW and vice versa in one-dimensional system for commensurability > 2. The strong electron-molecular vibration coupling drives both CDW and BOW, and plays thus an important role in the stabilization of the CDW state for these non-half-filled materials. Within the simply extended Peierls-Hubbard model, the experimentally observed lattice distortion of MEM(TCNQ)₂ can be precisely understood with our model calculation. In addition to the on-site repulsion U, the nearest-neighbor Coulomb interaction V is shown to play a vital role in the strongly correlated system; and a critical value V(c) is found for the quarter-filled system. With the understanding of the dominant broken symmetries in quasi-one-dimensional quarter-filled band, some implications for superconducting materials are discussed. The effect of band filling on the 4k(F) BOW instability is studied by the extended Peierls-Hubbard model; it is found that a strongly systematic tendency of the 4k(F) is dependent on the band filling. By studying the pair binding energy in some small clusters, we point out that the electron (or hole) pairing is not due to the Coulomb interaction, at least in the small U region.
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Libros sobre el tema "Electron electron interactions"

1

1938-, Ėfros A. L. y Pollak Michael, eds. Electron-electron interactions in disordered systems. Amsterdam: North-Holland, 1985.

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Schopper, H., ed. Electron-Positron Interactions. Berlin/Heidelberg: Springer-Verlag, 1992. http://dx.doi.org/10.1007/b46103.

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Dapor, Maurizio, ed. Electron-Beam Interactions with Solids. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-36507-9.

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Mistry, Krishan V. J. Exploring Electron–Neutrino–Argon Interactions. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-19572-3.

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B, Foster, ed. Electron-positron annihilation physics. Bristol: A. Hilger, 1990.

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Foley, Simon Timothy. Effects of electron-electron interactions on electronic transport in disordered systems. Birmingham: University of Birmingham, 2002.

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Talebi, Nahid. Near-Field-Mediated Photon–Electron Interactions. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33816-9.

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Kato, Takashi. Electron-phonon interactions in novel nanoelectronics. New York: Nova Science, 2009.

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International Commission on Radiation Units and Measurements., ed. Secondary electron spectra from charged particle interactions. Bethesda, Md: International Commission on Radiation Units and Measurements, 1996.

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G, Green M., ed. Electron-positron physics at the Z. Bristol: Institute of Physics Pub., 1998.

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Capítulos de libros sobre el tema "Electron electron interactions"

1

Razeghi, Manijeh. "Electron-Electron Interactions: Screening". En Fundamentals of Solid State Engineering, 461–72. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-75708-7_14.

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Gammel, J. T., D. K. Campbell y E. Y. Loh. "Competing Electron-Electron/Electron-Phonon Interactions and Polyacetylene". En Electronic Properties of Polymers, 25–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84705-9_5.

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Powell, Richard C. "Electron—Phonon Interactions". En Physics of Solid-State Laser Materials, 116–74. New York, NY: Springer New York, 1998. http://dx.doi.org/10.1007/978-1-4612-0643-9_4.

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Goldstein, Joseph I., Dale E. Newbury, Patrick Echlin, David C. Joy, A. D. Romig, Charles E. Lyman, Charles Fiori y Eric Lifshin. "Electron-Specimen Interactions". En Scanning Electron Microscopy and X-Ray Microanalysis, 69–147. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4613-0491-3_3.

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Keesee, R. G., A. W. Castleman y T. D. Mark. "Electron-Cluster Interactions". En Swarm Studies and Inelastic Electron-Molecule Collisions, 351–66. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4662-6_43.

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Reimer, Ludwig. "Electron-Specimen Interactions". En Transmission Electron Microscopy, 143–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-662-14824-2_5.

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Reimer, Ludwig. "Electron-Specimen Interactions". En Transmission Electron Microscopy, 136–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-21556-2_5.

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Reimer, Ludwig. "Electron-Specimen Interactions". En Transmission Electron Microscopy, 136–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-21579-1_5.

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Talebi, Nahid. "Electron-Light Interactions". En Near-Field-Mediated Photon–Electron Interactions, 31–57. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33816-9_3.

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Fischetti, Massimo V. y William G. Vandenberghe. "Electron—Phonon Interactions". En Advanced Physics of Electron Transport in Semiconductors and Nanostructures, 269–314. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-01101-1_13.

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Actas de conferencias sobre el tema "Electron electron interactions"

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Melissinos, A. C. "Laser Electron Interactions at Critical Field Strength". En International Conference on Ultrafast Phenomena. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/up.1996.wa.1.

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The electric field in the focus of an ultrafast laser pulse of sufficient energy can reach extremely high values; for I = 1019 W/cm2, Erms=Z0I∼6×1010V/cm. When a high energy electron traverses the laser focus, it experiences in its own rest-frame a field E * = 2γErms where γ = ε/mc2 is the Lorentz factor of the electron [ε is the energy and mc2 the rest mass of the electron]. In the present experiment, electrons from the Stanford Linear Accelerator collided with a frequency doubled pulse from a Nd:glass laser system.
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Pecchia, Gagliardi, Di Carlo, Niehaus, Frauenheim y Lugli. "Atomistic simulation of the electronic transport in organic nanostructures: electron-phonon and electron-electron interactions". En Electrical Performance of Electronic Packaging. IEEE, 2004. http://dx.doi.org/10.1109/iwce.2004.1407346.

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Campbell, D. K., M. P. Gelfand, H. Q. Lin y S. L. Sondhi. "Electron-electron interactions in superconducting fullerides". En International Conference on Science and Technology of Synthetic Metals. IEEE, 1994. http://dx.doi.org/10.1109/stsm.1994.835035.

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Medlar, Michael P. y Edward C. Hensel. "Electron-Phonon Interactions for Nanoscale Energy Transport Simulations in Semiconductor Devices". En ASME 2023 Heat Transfer Summer Conference collocated with the ASME 2023 17th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2023. http://dx.doi.org/10.1115/ht2023-106873.

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Abstract An ideal semiconductor device would permit unimpeded flow of electrons from its source to its drain in a fashion that can be switched on and off by its gate at high frequency. Electron flow through real semiconductor devices is impeded by interactions with the crystalline structure of the material. Electrons which interact with the crystal may generate phonons which manifest as thermal energy generation and degrade real device performance from its ideal limit. Accurate simulation of electron-phonon interactions cannot rely on the traditional continuum assumption because of the reduced length and time scales of modern semiconductor devices. Allowable electron-phonon interactions are constrained by the conservation of energy and momentum. Direct enforcement of the conservation laws is achieved through computation of an interaction table that contains thousands of rows each of which representing a conservative interaction. The rows represent both phonon and electron creation and annihilation. The electron and phonon wavevector space is discretized into 65,856 elements and the table is computed by searching the discretized wavevector space for electron and phonon states that first satisfy the conservation of momentum. Subsequently, these states are compared against the conservation of energy using the phonon and electron dispersion relations. Anisotropic phonon dispersion relations were calculated using a second nearest neighbor lattice dynamics approach with interatomic force constants from Density Functional Theory. Electron dispersion relations were computed using an empirical pseudopotential approach. This method was demonstrated for computation of electron-phonon interactions in silicon, resulting in an initial interaction table containing approximately 58,000 interactions. Computation of the electron energies associated with the first conduction band in an anisotropic manner illustrate reasonable agreement with published work. The interaction densities show similar functionality relative to the electron-phonon interaction rate predictions and phonon generation rates from published literature. The interaction table directly enforces the conservation laws on all electron-phonon interactions and the interaction table approach can be used for high fidelity electron-phonon simulations to quantify the mechanism, rate, and location of thermal losses arising at the nanoscale.
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DuBois, R. D. "Electron-electron and electron-nuclear interactions in fast neutral-neutral collisions". En The CAARI 2000: Sixteenth international conference on the application of accelerators in research and industry. AIP, 2001. http://dx.doi.org/10.1063/1.1395280.

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DuBois, R. D. "Electron-electron and electron-nuclear interactions in dressed ion-atom collisions". En The 19th international conference on the physics of electronic and atomic collisions. AIP, 1996. http://dx.doi.org/10.1063/1.49837.

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KRAVCHENKO, S. V. "EFFECTS OF ELECTRON-ELECTRON INTERACTIONS IN TWO DIMENSIONS". En Proceedings of the 32nd International Workshop. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814289153_0020.

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Narasimhan, Amrit, Steven Grzeskowiak, Jonathan Ostrander, Jonathon Schad, Eliran Rebeyev, Mark Neisser, Leonidas E. Ocola, Gregory Denbeaux y Robert L. Brainard. "Studying electron-PAG interactions using electron-induced fluorescence". En SPIE Advanced Lithography, editado por Christoph K. Hohle y Todd R. Younkin. SPIE, 2016. http://dx.doi.org/10.1117/12.2219850.

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Popovici, Carina, Christian Fischer y Lorenz von Smekal. "Effects of electron-electron interactions in suspended graphene". En Xth Quark Confinement and the Hadron Spectrum. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.171.0269.

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Simonaitis, John W., Maurice A. R. Krielaart, Stewart A. Koppell, Benjamin J. Slayton, Joseph Alongi, William P. Putnam, Karl K. Berggren y Phillip D. Keathley. "Electron-Photon Interactions in a Scanning Electron Microscope". En 2023 IEEE 36th International Vacuum Nanoelectronics Conference (IVNC). IEEE, 2023. http://dx.doi.org/10.1109/ivnc57695.2023.10188999.

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Informes sobre el tema "Electron electron interactions"

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Cowan, T., T. Ditmire y G. LeSage. Intense Laser - Electron Beam Interactions. Office of Scientific and Technical Information (OSTI), febrero de 2000. http://dx.doi.org/10.2172/802605.

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Abashian, A., K. Gotow y L. Philonen. Study of electron-positron interactions. Office of Scientific and Technical Information (OSTI), septiembre de 1990. http://dx.doi.org/10.2172/6513301.

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Abashian, A. Study of electron and neutrino interactions. Office of Scientific and Technical Information (OSTI), marzo de 1997. http://dx.doi.org/10.2172/461290.

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Xu, Xiaodong. Photon-Electron Interactions in Dirac Quantum Materials. Office of Scientific and Technical Information (OSTI), noviembre de 2017. http://dx.doi.org/10.2172/1408272.

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Murray, P. T. Threshold Electron Studies of Gas-Surface Interactions. Fort Belvoir, VA: Defense Technical Information Center, enero de 1985. http://dx.doi.org/10.21236/ada151271.

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Schutt, Timothy C. y Manoj K. Shukla. Computational Investigation on Interactions Between Some Munitions Compounds and Humic Substances. Engineer Research and Development Center (U.S.), febrero de 2021. http://dx.doi.org/10.21079/11681/39703.

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Humic acid substances (HAs) in natural soil and sediment environments effect the retention and degradation of insensitive munitions compounds and legacy high explosives (MCs): DNAN, DNi- NH4+, nMNA, NQ, NTO (neutral and anionic forms), TNT, and RDX.A humic acid model compound has been considered using molecular dynamics, thermodynamic integration, and density functional theory to characterize the munition binding ability, ionization potential, and electron affinity compared to that in the water solution. Humic acids bind most compounds and act as both a sink and source for electrons. Ionization potentials suggest HAs are more susceptible to oxidation than the MCs studied. The electron affinity of HAs are very conformation-dependent and spans the same range as the munition compounds. When HAs and MCs are complexed the HAs tend to radicalize first thus buffering MCs against reductive as well as oxidative attacks.
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Abashian, A. Study of electron and neutrino interactions. Final report. Office of Scientific and Technical Information (OSTI), marzo de 1997. http://dx.doi.org/10.2172/464156.

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Graham, G. y R. Roussel-Dupre. Relativistic collision rate calculations for electron-air interactions. Office of Scientific and Technical Information (OSTI), diciembre de 1992. http://dx.doi.org/10.2172/10158707.

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Graham, G. y R. Roussel-Dupre. Relativistic collision rate calculations for electron-air interactions. Office of Scientific and Technical Information (OSTI), diciembre de 1993. http://dx.doi.org/10.2172/10110739.

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Coleman-Smith, Christopher, Howard A. Padmore y Weishi Wan. Limits to Electron Beam Emittance from Stochastic Coulomb Interactions. Office of Scientific and Technical Information (OSTI), agosto de 2008. http://dx.doi.org/10.2172/957041.

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