To see the other types of publications on this topic, follow the link: Phononic Properties.

Dissertations / Theses on the topic 'Phononic Properties'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Phononic Properties.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Swinteck, Nichlas Z. "Phase-Space Properties of Two-Dimensional Elastic Phononic Crystals and Anharmonic Effects in Nano-Phononic Crystals." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228156.

Full text
Abstract:
This dissertation contains research directed at investigating the behavior and properties of a class of composite materials known as phononic crystals. Two categories of phononic crystals are explicitly investigated: (I) elastic phononic crystals and (II) nano-scale phononic crystals. For elastic phononic crystals, attention is directed at two-dimensional structures. Two specific structures are evaluated (1) a two-dimensional configuration consisting of a square array of cylindrical Polyvinylchloride inclusions in air and (2) a two-dimensional configuration consisting of a square array of stee
APA, Harvard, Vancouver, ISO, and other styles
2

Degiorgi, Leonardo Degiorgi Leonardo Degiorgi Leonardo Degiorgi Leonardo. "Electronic and phononic properties of one-dimensional Peierls-Hubbard systems /." [S.l.] : [s.n.], 1990. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=9045.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Daraio, Chiara. "Design of materials Configurations for enhanced phononic and electronic properties." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3211373.

Full text
Abstract:
Thesis (Ph. D.)--University of California, San Diego, 2006.<br>Title from first page of PDF file (viewed June 5, 2006). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 252-265).
APA, Harvard, Vancouver, ISO, and other styles
4

Tornatzky, Hans [Verfasser], Janina [Akademischer Betreuer] Maultzsch, Axel [Gutachter] Hoffmann, and Janina [Gutachter] Maultzsch. "Phononic and excitonic properties of transition metal dichalcogenides / Hans Tornatzky ; Gutachter: Axel Hoffmann, Janina Maultzsch ; Betreuer: Janina Maultzsch." Berlin : Technische Universität Berlin, 2019. http://d-nb.info/1200018265/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Cebrecos, Ruiz Alejandro. "Transmission, reflection and absorption in Sonic and Phononic Crystals." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/56463.

Full text
Abstract:
[EN] Phononic crystals are artificial materials formed by a periodic arrangement of inclusions embedded into a host medium, where each of them can be solid or fluid. By controlling the geometry and the impedance contrast of its constituent materials, one can control the dispersive properties of waves, giving rise to a huge variety of interesting and fundamental phenomena in the context of wave propagation. When a propagating wave encounters a medium with different physical properties it can be transmitted and reflected in lossless media, but also absorbed if dissipation is taken into account.
APA, Harvard, Vancouver, ISO, and other styles
6

Sen, M. "Study of magnetic, electric and thermal properties in Fe3Se4 system: Interplay of spin, charge and phonon." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2017. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/5870.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Cope, Elizabeth Ruth. "Dynamic properties of materials : phonons from neutron scattering." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/226116.

Full text
Abstract:
A detailed understanding of fundamental material properties can be obtained through the study of atomic vibrations, performed experimentally with neutron scattering techniques and coupled with the two powerful new computational methodologies I have developed. The first approach involves phonon-based simulations of the pair distribution function - a histogram of localised atomic positions generated experimentally from total scattering data. This is used to reveal ordering behaviour, to validate interatomic models and localised structure, and to give insights into how far dynamic behaviour can b
APA, Harvard, Vancouver, ISO, and other styles
8

Roome, Nathanael J. "Electronic and phonon properties of 2D layered materials." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/807275/.

Full text
Abstract:
The focus of this thesis is the study of the electronic and vibrational properties of single layer graphene, silicene and germanene, and bilayer graphene and silicene. Specifically the electronic band structure and Fermi velocity of the carriers as well as the phonon dispersion are calculated; Raman active modes are identified as well. Material stability and electron-phonon effects are also investigated. It is found that in both silicene and germanene linear band dispersion behaviour is found in a planar and a low buckling configuration where the Fermi velocity is 5  105 m/s; about 35% lower
APA, Harvard, Vancouver, ISO, and other styles
9

Servantie, James. "Dynamics and friction in double walled carbon nanotubes." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210833.

Full text
Abstract:
The objective of this PhD thesis was the study of friction in carbon nanotubes by analytical methods and molecular dynamics simulations. The goal of this research was to characterize the properties of friction in nanotubes and from a more general point of view the understanding of the microscopic origin of friction. Indeed, the relative simplicity of the system allows us to interpret more easily the physical phenomenon observed than in larger systems. In order to achieve this goal, non-equilibrium statistical mechanics permitted first to develop models based on Langevin equations describing th
APA, Harvard, Vancouver, ISO, and other styles
10

Paudel, Tula R. "Structure, Phonons and Realated Properties in Zn-IV-N2 (IV=Si,Ge,Sn), ScN and Rare-Earth Nitrides." Case Western Reserve University School of Graduate Studies / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1226530202.

Full text
APA, Harvard, Vancouver, ISO, and other styles
11

Bulbul, Mahir Mehmet. "Raman spectroscopy of GaN epilayers and InGaAlAs quaternary semiconductor alloys." Thesis, University of Essex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242232.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Chávez, Ángel Emigdio. "Confined acoustic phonons in si nanomembranes: impact on thermal properties." Doctoral thesis, Universitat Autònoma de Barcelona, 2014. http://hdl.handle.net/10803/284871.

Full text
Abstract:
La tendencia de la miniaturización tecnológica ha conducido a la generación de densidades de potencia que exceden los 100 watts/cm2, los cuales están en el orden del calor producido en los reactores termonucleares. La necesidad de nuevas técnicas y procesos de enfriamiento ha posicionado al manejo térmico en el escenario científico en estos últimos años. Por otro lado, la ingeniería de la conducción térmica puede abrir rutas nuevas rutas para recolección energética, por ejemplo, a través de la generación termoeléctrica. Como consecuencia, el control y la ingeniería de fonones a nivel nanométri
APA, Harvard, Vancouver, ISO, and other styles
13

Galda, Alexey. "Electronic properties of Luttinger Liquid with electron-phonon interaction." Thesis, University of Birmingham, 2013. http://etheses.bham.ac.uk//id/eprint/4293/.

Full text
Abstract:
This thesis addresses a theoretical study of the problem of a single impurity embedded in a one-dimensional system of interacting electrons in presence of electron-phonon coupling. First we consider a system with a featureless point-like potential impurity, followed by the case of a resonant level hybridised with a Luttinger Liquid. The stress is made on a more fundamental problem of a featureless scatterer, for which two opposite limits in the impurity strength are considered: a weak scatterer and a weak link. We have found that, regardless of the transmission properties of phonons through th
APA, Harvard, Vancouver, ISO, and other styles
14

Patamia, Steven Eugene. "Spectrum and properties of mesoscopic surface-coupled phonons in rectangular wires." [Gainesville, Fla.] : University of Florida, 2001. http://purl.fcla.edu/fcla/etd/UFE0000341.

Full text
Abstract:
Thesis (Ph. D.)--University of Florida, 2001.<br>Title from title page of source document. Document formatted into pages; contains vii, 147 p.; also contains graphics. Includes vita. Includes bibliographical references.
APA, Harvard, Vancouver, ISO, and other styles
15

Anindya, Khalid. "Interlayer Defect Effects on the Phonon Properties of Bilayer Graphene and its Nanoribbon." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40411.

Full text
Abstract:
Phonon properties of AB (Bernal) stacked bilayer graphene (BLG) with various types of defects have been investigated theoretically. Forced Vibrational (FV) method has been employed to compute the phonon modes of disordered BLG. A downward linear shift of E2g mode frequencies has been observed with an increasing amount of defect concentration. Moreover, two identical E2g peaks have been observed in PDOS of the bilayer system where the individual layer contains 12C and 13C atoms respectively. From computed typical mode patterns of in-plane K-point optical mode phonons, it has been noticed that p
APA, Harvard, Vancouver, ISO, and other styles
16

Hewett, Nicholas Peter. "The electron-phonon interaction in a two dimensional electron gas." Thesis, University of Nottingham, 1988. http://eprints.nottingham.ac.uk/14218/.

Full text
Abstract:
At low temperatures the predominant energy loss mechanism for a Joule-heated two dimensional electron gas (2DEG) in a metal oxide semiconductor field effect transistor (MOSFET) is by acoustic phonon emission. By very accurately measuring the temperature gradient developed along the silicon substrate the phonon emission has been investigated as a function of electron concentration, device power, magnetic field and temperature. In zero magnetic field the results show the cut-off predicted theoretically in the maximum phonon momentum that can be emitted in the plane of the 2DEG for low electron c
APA, Harvard, Vancouver, ISO, and other styles
17

Tohei, Tetsuya. "Phonon and related properties of double oxides by first principles calculations." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/143977.

Full text
APA, Harvard, Vancouver, ISO, and other styles
18

Tlili, Amani. "The effect of a partial nanocrystallization on the transport properties of amorphous/crystalline composites." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1322/document.

Full text
Abstract:
Les besoins technologiques toujours grandissants dans la société moderne suscitent la nécessité de développer des matériaux multifonctionnels innovants. Ceci est vrai surtout dans des domaines de pointe, tels que la microélectronique et la conversion d'énergie, où on demande aux matériaux de limiter la dissipation de chaleur tout en ayant de bonnes propriétés électroniques.L'optimisation d'un tel type de matériaux est toutefois complexe: une forte réduction de la conductivité thermique se fait en général aux dépenses de la conductivité électrique. Une stratégie qui a été récemment introduite e
APA, Harvard, Vancouver, ISO, and other styles
19

Rizzo, Francesco, Francesco Rizzo, Francesco Rizzo, FRANCESCO RIZZO, and Francesco Rizzo. "Transport Properties and Electron-Phonon Interaction in the Normal State of High Temperature Superconductors." Doctoral thesis, La Sapienza, 2005. http://hdl.handle.net/11573/917307.

Full text
APA, Harvard, Vancouver, ISO, and other styles
20

Tang, Xiaoli Dong Jianjun. "Theoretical study of thermal properties and thermal conductivities of crystals." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Physics/Dissertation/Tang_Xiaoli_9.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Antolin, Nikolas. "Density-Functional Theory Study of Materials and Their Properties at Non-Zero Temperature." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452253704.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Machón, Valbuena María. "Electron-phonon coupling, vibrational, and optical properties of carbon nanotubes and picotubes." [S.l.] : [s.n.], 2006. http://opus.kobv.de/tuberlin/volltexte/2006/1440.

Full text
APA, Harvard, Vancouver, ISO, and other styles
23

Bifano, Michael F. P. "Theory and Measurements of Thermal Properties in Nanowires and Carbon Nanotubes." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1339998535.

Full text
APA, Harvard, Vancouver, ISO, and other styles
24

Zhang, Hantao S. M. Massachusetts Institute of Technology. "Computational investigation of the thermal conductivities and phonon properties of strontium cobalt oxides." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123356.

Full text
Abstract:
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2019<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 87-91).<br>The thermal conductivities of electrochemically tuned strontium cobalt oxides (SCO) are significantly different among the perovskite SrCoO3 (P-SCO), the brownmillerite SrCoO2.5 (BM-SCO) and the hydrogenated HSrCoO2.5 (H-SCO)1. The
APA, Harvard, Vancouver, ISO, and other styles
25

Domènech, i. Amador Núria. "Phonons in III-nitride thinfilms, bulk and nanowires: a closer look into InN vibrational properties". Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/348867.

Full text
Abstract:
This thesis is devoted to the study of the interactions of phonons in indium nitride (InN) and materials of the (In,Ga)N system with wurtzite structure. For this purpose, we present Raman spectroscopy on nanowires (NWs), thin films and bulk samples, in order to adress phonon interactions in these materials. We also present Brillouin spectrsocopy measurements of InN thin films, from which a reliable set of elastic constants is proposed. We have studied the phonon anharmonic interactions and phonon decay channels of InN, both in thin films and NWs. The temperature dependence of Raman peak wid
APA, Harvard, Vancouver, ISO, and other styles
26

Greenstein, Abraham. "Analysis of thermal conductivity models with an extension to complex crystalline materials." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24710.

Full text
Abstract:
Thesis (Ph.D.)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Graham, Samuel; Committee Co-Chair: Nair, Sankar; Committee Member: Grover - Gallivan, Martha; Committee Member: McDowell, David; Committee Member: Schelling, Patrick; Committee Member: Zhang, Zhuomin
APA, Harvard, Vancouver, ISO, and other styles
27

Gerleman, Ian Gregory. "Thermo-electric properties of two-dimensional silicon based heterostructures." Thesis, University of Warwick, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343787.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Fagas, Georgios. "Vibrational properties of complex solids." Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321898.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Valakh, M. Ya, A. P. Litvinchuk, V. M. Dzhagan, et al. "Optical properties of quaternary kesterite-type Cu2Zn(Sn1−xGex)S4 crystalline alloys: Raman scattering, photoluminescence and first-principle calculations." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-219947.

Full text
Abstract:
The transformation of the vibrational spectrum of Cu2Zn(Sn1−xGex)S4 single crystals over the entire composition range (0 ≤ x ≤ 1) is studied experimentally by low-temperature Raman scattering and photoluminescence spectroscopies, as well as theoretically in the framework of density functional theory (DFT). It is shown that unlike “classic” mixed binary II–VI and III–V compounds, which are characterized by either one- or two-mode behavior of spectra transformation upon composition variation, the vibrational modes of the quaternary semiconductor Cu2Zn(Sn1−xGex)S4 exhibit both types of behavior w
APA, Harvard, Vancouver, ISO, and other styles
30

DEL, GOBBO SILVANO. "Cadmium sulfide quantum dots: growth and optical properties." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/873.

Full text
Abstract:
Negli ultimi anni, c’è stato un rapido sviluppo delle tecniche di crescita dei materiali nanostrutturati, e un forte impulso è stato dato dall’introduzione delle tecniche di crescita colloidale. Tali tecniche consentono di crescere un ampia gamma di materiali nanostrutturati, metalli e semiconduttori, con elevata cristallinità, dimensioni ridotte (< 5 nm) e con una distribuzione delle dimensioni molto stretta. Il solfuro di cadmio (CdS) nanostrutturato ha promettenti future applicazioni tecnologiche, come ad esempio nei dispositivi optoelettronici, celle solari ad alta efficienza e come tracci
APA, Harvard, Vancouver, ISO, and other styles
31

Yildirim, Handan. "STRUCTURAL, ELECTRONIC, VIBRATIONAL AND THERMODYNAMICAL PROPERTIES OF SURFACES AND NANOPARTICLES." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3533.

Full text
Abstract:
The main focus of the thesis is to have better understanding of the atomic and electronic structures, vibrational dynamics and thermodynamics of metallic surfaces and bi-metallic nanoparticles (NPs) via a multi-scale simulational approach. The research presented here involves the study of the physical and chemical properties of metallic surfaces and NPs that are useful to determine their functionality in building novel materials. The study follows the  bottom-up approach for which the knowledge gathered at the scale of atoms and NPs serves as a base to build, at the macroscopic scale, mater
APA, Harvard, Vancouver, ISO, and other styles
32

Yue, Sheng Ying [Verfasser], Ming [Akademischer Betreuer] Hu, and Matthieu [Akademischer Betreuer] Verstraete. "Thermal properties of phonons and electrons in materials from ab initio / Sheng Ying Yue ; Ming Hu, Matthieu Verstraete." Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1162955414/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Paudel, Tula R. "Structure, phonons and related properties in Zn-IV-N₂ (IV=Si,Ge,Sn), ScN and rare-earth nitrides." online version, 2009. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=case1226530202.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Климов, Олексій Володимирович, Алексей Владимирович Климов, Oleksii Volodymyrovych Klymov, et al. "Raman investigation and electro-physical properties of II-VI wide-band gap films." Thesis, Publishing House of Bucharest University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/29353.

Full text
Abstract:
В даній роботі розглядались електро-фізичні властивості сполук групи А2В6 та їх дослідження за допомогою раманівської спектроскопії. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/29353<br>В данной работе рассматривались электро-физические свойства соединений группы А2В6 и их исследования с помощью рамановского спектроскопии. При цитировании документа, используйте ссылку http://essuir.sumdu.edu.ua/handle/123456789/29353<br>In this work shown electro-physical properties of the compounds of group A2B6 and their research using Raman spectroscopy. Whe
APA, Harvard, Vancouver, ISO, and other styles
35

Urbaszek, Bernhard. "Fundamental studies of excitonic properties in II-VI semiconductors." Thesis, Heriot-Watt University, 2001. http://hdl.handle.net/10399/540.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Ma, Yi. "Thermoelectric Properties of P-Type Nanostructured Bismuth Antimony Tellurium Alloyed Materials." Thesis, Boston College, 2009.

Find full text
Abstract:
Thesis advisor: Zhifeng Ren<br>Solid-state cooling and power generation based on thermoelectric effects are attractive for a wide range of applications in power generation, waste heat recovery, air-conditioning, and refrigeration. There have been persistent efforts on improving the figure of merit (ZT) since the 1950's; only incremental gains were achieved in increasing ZT, with the (Bi1-xSbx)2(Se1-yTey)3 alloy family remaining the best commercial material with ZT ~ 1. To improve ZT to a higher value, we have been pursuing an approach based on random nanostructures and the idea that the therma
APA, Harvard, Vancouver, ISO, and other styles
37

Da, silva Antonio. "Theoretical determination of optical properties for sapphire doped with titanium from its microscopy and analysis of its capabilities for laser without population inversion." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX075/document.

Full text
Abstract:
Cet exposé est scindé en deux grandes parties. Dans la première, nous estimons des constantes photo-physiques du saphir dopé au titane à partir d'un modèle analytique simple exploitant une théorie de Huang-Rhys pour la détermination du profil spectral des bandes simples et une hypothèse réaliste de superposition de ces dernières. Nous déterminons une formule pour l'indice de réfraction total du Ti:saphir en fonction de la concentration de dopant. Dans une seconde partie, nous évaluons, selon la vérification d'un concept, la capacité de laser sana inversion de populations pour un cristal dopé p
APA, Harvard, Vancouver, ISO, and other styles
38

Leach, Jacob H. "Tuning of electrical properties in InAlN/GaN HFETs and Ba0.5Sr0.5TiO3/YIG Phase Shifters." VCU Scholars Compass, 2010. http://scholarscompass.vcu.edu/etd/2035.

Full text
Abstract:
Engineers know well from an early point in their training the trials and tribulations of having to make design tradeoffs in order to optimize one performance parameter for another. Discovering tradeoff conditions that result in the elimination of a loss associated with the enhancement of some other parameter (an improvement over a typical tradeoff), therefore, ushers in a new paradigm of design in which the constraints which are typical of the task at hand are alleviated. We call such a design paradigm “tuning” as opposed to “trading off”, and this is the central theme of this work. We investi
APA, Harvard, Vancouver, ISO, and other styles
39

Cardoch, Sebastian. "Studying Atomic Vibrations by Transmission Electron Microscopy." Thesis, Uppsala universitet, Materialteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305370.

Full text
Abstract:
We employ the empirical potential function Airebo to computationally model free-standing Carbon-12 graphene in a classical setting. Our objective is to measure the mean square displacement (MSD) of atoms in the system for different average temperatures and Carbon-13 isotope concentrations. From results of the MSD we aim to develop a technique that employs Transmission Electron Microscopy (TEM), using high-angle annular dark filed (HAADF) detection, to obtain atomic-resolution images. From the thermally diffusive images, produced by the vibrations of atoms, we intent to resolve isotopes types i
APA, Harvard, Vancouver, ISO, and other styles
40

Wang, Wei. "Manipulation of Lamb waves with elastic metamaterials." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS414.

Full text
Abstract:
Nous développons des métamatériaux élastiques à piliers pour manipuler les ondes de Lamb. Dans un premier temps, les propriétés négatives associées aux résonances de flexion, de compression et de torsion dans deux structures constituées de piliers sur un seul côté d’une membrane sont examinées. Nous décrivons deux mécanismes différents des propriétés de double négativité. Le potentiel de ces structures pour la réfraction négative et le cloaking acoustique est démontré. Deuxièmement, nous présentons le transport protégé topologiquement des ondes de Lamb par analogie avec les effets Hall quantiq
APA, Harvard, Vancouver, ISO, and other styles
41

Yang, Li. "First-principles Calculations on the Electronic, Vibrational, and Optical Properties of Semiconductor Nanowires." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14133.

Full text
Abstract:
The first part of my PhD work is about the lattice vibrations in silicon nanowires. First-principles calculations based on the linear response are performed to investigate the quantum confinement effect in lattice vibrations of silicon nanowires (SiNW). The radial breathing modes (RBM) are found in our calculations, which have a different size-dependent frequency shift compared with the optical modes. They are well explained by the elastic model. Finally, the relative activity of the Raman scattering in the smallest SiNW is calculated. The RBM can be clearly identified in the Raman spectrum, w
APA, Harvard, Vancouver, ISO, and other styles
42

Silva, Antonio Vinnie dos Santos. "Structural, vibrational and morphological properties of La2CoMnO6 multiferroics films." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17901.

Full text
Abstract:
Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>FundaÃÃo de Amparo à Pesquisa e ao Desenvolvimento CientÃfico e TecnolÃgico do MaranhÃo<br>CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>Perovskitas duplas com fÃrmula na forma A2BBâO6 (A = La, Sr, Ca, B/Bâ = Co/Mn ou Fe/Mo) sÃo materiais multiferrÃicos de grande interesse na ciÃncia devido Ãs notÃveis propriedades, que permitem aplicaÃÃes em capacitores e em memÃrias, por exemplo. AlÃm disso, mudanÃas estruturais sÃo observadas entre a form
APA, Harvard, Vancouver, ISO, and other styles
43

Verstraete, Matthieu. "Ab initio calculation of the structural, electronic, and superconducting properties of nanotubes and nanowires." Université catholique de Louvain, 2005. http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-06282005-114313/.

Full text
Abstract:
The structural, electronic, and superconducting properties of one dimensional materials are calculated from first principles, using the density functional theory. Nanotubes and nanowires are important building blocks in nanotechnology, in particular for nanoelectronics. In this manuscript, the growth of carbon nanotubes is studied through the interaction between carbon and the transition metal atoms used as growth catalysts. The accepted model for a new phase of nanotube-like molybdenum disulfide is critically examined using comparisons of energetic stability and types of chemical bonding in d
APA, Harvard, Vancouver, ISO, and other styles
44

Ostapenko, Irina [Verfasser], and Dieter [Akademischer Betreuer] Bimberg. "Influence of defects, phonons and strain on the luminescence properties of nitride- and arsenide-based quantum dots / Irina Ostapenko. Betreuer: Dieter Bimberg." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2012. http://d-nb.info/1026483824/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Alcantara, Ortigoza Marisol. "Theoretical studies of electronic, vibrational, and magnetic properties of chemisorbed surfaces and nanoalloys." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/496.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Baumgartl, Jörg. "Colloids as model systems for condensed matter investigation of structural and dynamical properties of colloidal systems using digital video microscopy and optical tweezers /." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-31322.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Wang, Yifeng, Kyu Hyoung Lee, Hiromichi Ohta, and Kunihito Koumoto. "Thermoelectric properties of electron doped SrO(SrTiO3)n (n=1,2) ceramics." American Institite of Physics, 2009. http://hdl.handle.net/2237/12629.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Kasic, Alexander [Verfasser]. "Phonons, free-carrier properties, and electronic interband transitions of binary, ternary, and quaternary group-III nitride layers measured by spectroscopic ellipsometry / Alexander Kasic." Aachen : Shaker, 2003. http://d-nb.info/117054195X/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Hudiono, Yeny C. "Thermal transport properties of nanoporous zeolite thin films." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24748.

Full text
Abstract:
Thesis (Ph.D.)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Prof. Sankar Nair; Committee Co-Chair: Prof. Samuel Graham; Committee Member: Prof. Amyn S. Teja; Committee Member: Prof. Mo Li; Committee Member: Prof. Peter Ludovice.
APA, Harvard, Vancouver, ISO, and other styles
50

Davier, Brice. "Theoretical study of thermoelectric properties in nanostructures." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS529/document.

Full text
Abstract:
Les générateurs thermoélectriques convertissent directement l'énergie thermique en énergie électrique. Ils pourraient devenir de plus en plus utiles à des fins de récupération d'énergie et font l'objet de recherches actives. Cependant, les meilleurs matériaux thermoélectriques sont rares et polluants.Le Silicium et le Germanium seraient des matériaux intéressants si leur efficacité thermoélectrique était améliorée. Pour ce faire, la nanostructuration est une voie possible, par exemple en introduisant des faces rugueuses ou de nouvelles interfaces semi-transparentes.Récemment, des nanofils poly
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!