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Dissertations / Theses on the topic 'Quantum oscillation in insulator'

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Published: 6 September 2023
Last updated: 7 September 2023

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1

Sato, Yuki. "Quantum oscillations and charge-neutral fermions in Kondo insulator YbB₁₂." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263447.

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2

Bègue, Frédéric. "Isolants topologiques et magnétisme." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30392/document.

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La découverte de l'effet Hall quantique par von Klitzing en 1980 a ouvert la voie à ce qui sera connu plus tard comme la théorie topologique des bandes. Dans le cadre de cette théorie, on ne s'intéresse plus uniquement à la relation de dispersion énergétique des électrons dans les cristaux, mais aussi à l'organisation topologique de la structure de bande. Cette théorie a permis la découverte d'une nouvelle phase de la matière, représentée par les isolants topologiques. Ces isolants topologiques ont de particulier qu'ils se comportent comme des isolants normaux dans le bulk, mais présentent des
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3

Semeniuk, Konstantin. "Correlated low temperature states of YFe2Ge2 and pressure metallised NiS2." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274346.

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While the free electron model can often be surprisingly successful in describing properties of solids, there are plenty of materials in which interactions between electrons are too significant to be neglected. These strongly correlated systems sometimes exhibit rather unexpected, unusual and useful phenomena, understanding of which is one of the aims of condensed matter physics. Heat capacity measurements of paramagnetic YFe$_{2}$Ge$_{2}$ give a Sommerfeld coefficient of about 100 mJ mol$^{−1}$ K$^{−2}$, which is about an order of magnitude higher than the value predicted by band structure cal
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4

Khan, Hasan. "Quantum Fluctuations Across the Superconductor-Insulator Transition." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1553188107263297.

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5

Tan, Hong'En. "High pressure quantum oscillation study of BiTeI and Bi2Te3." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284884.

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The work presented in this thesis investigates the behaviour of the Rashba semi-conductor BiTeI and of the topological insulator $\text{Bi}_2\text{Te}_3\,$ under pressure. Using Shubnikov-de Haas quantum oscillation measurements, the evolution of the Fermi surface of both materials was tracked as a function of pressure. At ambient pressure, two distinct quantum oscillation frequencies in BiTeI, corresponding to inner and outer Fermi surface orbits as a result of spin-splitting caused by the Rashba effect, were observed. Using a model Hamiltonian with a Rashba interaction term to model this sys
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6

Doiron-Leyraud, Nicolas. "Quantum oscillation and high pressure studies on correlated metals." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619930.

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7

Mottahedeh, Roya. "Various aspects of quantum Hall effect." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306508.

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8

Renberg, Rasmus. "Superconductor-Insulator Quantum Phase Transitions in a Dissipative Environment." Thesis, KTH, Fysik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239615.

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9

Hsu, Yu-Te. "Unconventional Fermi surface in insulating SmB6 and superconducting YBa2Cu3O6+x probed by high magnetic fields." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/280314.

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Fermi surface, the locus in momentum space of gapless low-energy excitations, is a concept of fundamental importance in solid state physics. Electronic properties of a material are determined by the long-lived low-energy excitations near the Fermi surface. Conventionally, Fermi surface is understood as a property exclusive to a metallic state, contoured by electronic bands crossed by the Fermi level, although there has been a continuing effort in searching for Fermi surface outside the conventional description. In this thesis, techniques developed to prepare high-quality single crystals of SmB
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10

Li, Li. "Study of Metal-Insulator-Metal Diodes for Photodetection." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1367319217.

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11

Schroeder, Brett. "Surface modification enhanced semiconductor-on-insulator heteroepitaxy /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/9808.

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12

Lam, Jennifer. "The nature of the metal-insulator transition in SiGe quantum wells." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq20977.pdf.

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13

Piekarek, Mateusz. "High-extinction ratio optical filtering for silicon-on-insulator quantum photonics platform." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.715763.

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14

Lam, Jennifer Eleanor. "The nature of the metal-insulator transition in silicon germanide quantum wells." Thesis, University of Ottawa (Canada), 1997. http://hdl.handle.net/10393/4399.

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A study of the temperature dependence of the resistivity of gated SiGe quantum well structures has revealed a metal-insulator transition as a function of carrier density at zero magnetic field. Although early scaling theories (Abrahams et al., 1979) have argued against the existence of a metal-insulator transition at zero temperature in infinite 2D and 1D systems, more recent theoretical results using a random set of two-dimensional point potentials have shown that such a transition is allowed in two dimensions (Az'bel, 1992). Mounting experimental evidence for such a transition in 2D systems
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15

Ziegler, Johannes [Verfasser], and Dieter [Akademischer Betreuer] Weiss. "Quantum transport in HgTe topological insulator nanostructures / Johannes Ziegler ; Betreuer: Dieter Weiss." Regensburg : Universitätsbibliothek Regensburg, 2019. http://d-nb.info/1180719573/34.

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16

Francheteau, Anaïs. "Superconducting silicon on insulator and silicide-based superconducting MOSFET for quantum technologies." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY092/document.

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L'introduction de la supraconductivité dans des structures de type MOSFET en silicium ouvre de nouvelles perspectives dans la recherche en physique. Dans cette thèse, on s'intéresse aux propriétés de transport électronique au sein d'un MOSFET fabriqué avec des sources et drains supraconducteurs. Afin de garantir la reproductibilité de ces dispositifs, il est important d'intégrer des matériaux supraconducteurs compatibles avec la technologie CMOS exploitant la technologie silicium qui a pour énorme avantage d'être véritablement fiable et mature. L'idée fondamentale est de réaliser un nouveau ty
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17

Di, Mauro Marco. "Flavor mixing in quantum field theory and quantum information." Doctoral thesis, Universita degli studi di Salerno, 2011. http://hdl.handle.net/10556/194.

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2009 - 2010<br>After reviewing the formalism for describing flavor mixing, both in Quantum Mechanics and Quantum Field Theory, some consequences along three different directions are studied. First, it is proposed that flavor mixing can be a viable candidate for spontaneous supersymmetry breaking, due to the nontrivial vacuum structure induced by it. After the statement of the conjecture, an explicit proof in a simple case is given. Second, the properties of flavor states as entangled states both in QM and QFT are studied. By interpreting such states as multipartite mode–entangled states,
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18

Hussain, Mallik Mohd Raihan. "Effective Nonlinear Susceptibilities of Metal-Insulator and Metal-Insulator-Metal Nanolayered Structures." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1591207594352716.

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19

Boukahil, Mounir. "Quantum criticality and Fermisurface instabilities investigation by pressure and quantum oscillation measurements on Ce and Ybbased heavy fermion compounds." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY090/document.

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L'auteur n'a pas fourni de résumé en français<br>The superconductivity had been thought to be incompatible with the magnetism, because the former originates from the weak attractive leading to the formation of Cooper pairs, whereas the latter is based on the strong Coulomb repulsive force, leading also to strong electronic correlations. Unconventional superconductors,which include heavy fermion systems, high-Tc cuprates, organic superconductors, and iron-pnictides, is a major topic of condensed matter physics. In all these systems, it has been understood that magnetism can even plays an import
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20

Qiu, Lei. "Exploring 2D Metal-Insulator Transition in p-GaAs Quantum Well with High rs." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1386337954.

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21

Bonneau, Damien. "Integrated quantum photonics at telecommunication wavelength in silicon-on-insulator and lithium niobate platforms." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.664624.

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Photonic quantum technologies are a promising approach to implement quantum information tasks including physically secured communication, efficient simulation of quantum systems, and could ultimately lead to the realisation of a full scale quantum computer. Integrated photonics have been successfully used to expand the scope of quantum optics experiments, unlocking the capability to perform more and more complex quantum tasks. The current effort points towards the integration of all the components in a single monolithic chip including single photon sources, passive circuits, fast phase-modulat
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22

Tenasini, Giulia. "Quantum transport in monolayer WTe2." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14897/.

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Il ditellurio di tungsteno (WTe2) appartiene alla classe dei dicalcogenuri di metalli di transizione (TMDs), che rappresentano attualmente i materiali più promettenti, insieme al grafene, nel campo di ricerca dei cristalli bidimensionali (2D). Grazie ad una caratteristica struttura stratificata, con differenti piani atomici legati da forze di van der Waals, mediante esfoliazione è possibile isolare strati di spessore quasi-atomico di TMDs, detti “monostrati”, con proprietà spesso molto diverse dal materiale bulk originario. Il WTe2 nella sua forma a monostrato, è stato recentemente oggett
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23

Perez, Barraza Julia Isabel. "Ultrasmall silicon quantum dots for the realization of a spin qubit." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708003.

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24

Watson, Deborah Lee. "Quantum interference effects in the magnetoresistance of semiconductor structures near the metal to insulator transition." Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286547.

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25

O'Neal, Jared. "A Numerical Study of a Disorder-driven 2D Mott Insulator-to-Metal Quantum Phase Transition." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492701913534985.

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26

Schönle, Joachim. "Quantum transport studies for spintronics implementation : from supramolecular carbon nanotube systems to topological crystalline insulator." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAY022/document.

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L'électronique moléculaire est l'un des domaines les plus intrigants de la recherche moderne. Ce domaine pourrait produire un système de construction modulaire et évolutif pour des applications spintroniques à l'échelle nanométrique. Un exemple particulièrement prometteur est celui des aimants à une seule molécule, qui se sont déjà avérés être appropriés pour des la réalisation de spin valve et de qubit de spin. L'un des plus grands défis du domaine est l'intégration de ces objets de taille nanométrique dans des circuits complexes afin de permettre la détection et la manipulation d'états de sp
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27

Hussain, Mallik Mohd Raihan. "Nonlinear Electromagnetic Radiation from Metal-Insulator-Metal Tunnel Junctions." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1490823061190116.

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28

Clarke, Warrick Robin Physics Faculty of Science UNSW. "Quantum interaction phenomena in p-GaAs microelectronic devices." Awarded by:University of New South Wales. School of Physics, 2006. http://handle.unsw.edu.au/1959.4/32259.

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In this dissertation, we study properties of quantum interaction phenomena in two-dimensional (2D) and one-dimensional (1D) electronic systems in p-GaAs micro- and nano-scale devices. We present low-temperature magneto-transport data from three forms of low-dimensional systems 1) 2D hole systems: in order to study interaction contributions to the metallic behavior of 2D systems 2) Bilayer hole systems: in order to study the many body, bilayer quantum Hall state at nu = 1 3) 1D hole systems: for the study of the anomalous conductance plateau G = 0.7 ???? 2e2/h The work is divided into five ex
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29

VELLEI, ANTONIO. "Silicon-on-insulator nanowires as spintronic device for quantum computing: design, processing, fabrication and electrical characterization." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/20213.

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In semiconductor industries, the passage from traditional CMOS toward SOI technology has fruitfully helped for eliminating most of the detrimental substrate effects connected with leakage current and parasitic effect present in devices fabricated according to CMOS technology. It can be argued how SOI technology emphasizes the real capabilities of low dimensional systems. Nanowires (NWs) are basilar structures which have two quantum confined directions which, if opportunely scaled down, are expected to give rise to quantistic confinement, while still leaving one unconfined direction for electri
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30

Rosenbach, Daniel [Verfasser], Daniel [Akademischer Betreuer] Schäpers, and Markus [Akademischer Betreuer] Morgenstern. "Quantum transport and induced superconductivity in selectively deposited topological insulator devices / Daniel Rosenbach ; Daniel Schäpers, Markus Morgenstern." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1240480407/34.

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31

Ratnadurai, Rudraskandan. "Development of a Reliable Metal-Insulator-Metal Bilayer Tunnel Junction for Wideband Detectors." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4394.

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Detectors and sensors are an integral part of modern electronics and are crucial to highly sensitive applications. Metal-Insulator-Metal (MIM) tunnel junctions have been explored for the past five decades and are still being investigated due to its wide use of applications such as mixers, capacitors, detectors, rectifiers and energy conversion devices. In this research, various designs of thin film based tunnel junctions have been investigated and the optimum one picked for the purpose of a wide band detector up to 10GHz based on their sensitivities. A modified design with an isolation layer i
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32

Repellin, Cécile. "Numerical study of fractional topological insulators." Thesis, Paris, Ecole normale supérieure, 2015. http://www.theses.fr/2015ENSU0028/document.

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Les isolants topologiques sont des isolants qui ne peuvent être différenciés des isolants atomiques que par une grandeur physique non locale appelée invariant topologique. L'effet Hall quantique et son équivalent sans champ magnétique l'isolant de Chern sont des exemples d'isolants topologiques. En présence d'interactions fortes, des excitations exotiques appelées anyons peuvent apparaître dans les isolants topologiques. L'effet Hall quantique fractionnaire (EHQF) est la seule réalisation expérimentale connue de ces phases. Dans ce manuscrit, nous étudions numériquement les conditions d'émerge
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33

Ellis, Jason Keith. "Emergent Phenomena in Classical and Quantum Systems: Cellular Dynamics in E. coli and Spin-Polarization in Fermi Superfluids." [Kent, Ohio] : Kent State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=kent1256932939.

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34

Lam, Ping Koy, and Ping Lam@anu edu au. "Applications of Quantum Electro-Optic Control and Squeezed Light." The Australian National University. Faculty of Science, 1999. http://thesis.anu.edu.au./public/adt-ANU20030611.170800.

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In this thesis, we report the observations of optical squeezing from second harmonic generation (SHG), optical parametric oscillation (OPO) and optical parametric amplification (OPA). Demonstrations and proposals of applications involving the squeezed light and electro-optic control loops are presented. ¶ In our SHG setup, we report the observation of 2.1 dB of intensity squeezing on the second harmonic (SH) output. Investigations into the system show that the squeezing performance of a SHG system is critically affected by the pump noise and a modular theory of noise propagation is developed t
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35

Konishi, Hideki. "Collisional stability of localized metastable ytterbium atoms immersed in a Fermi sea of lithium." 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225386.

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36

Kessel, Maximilian [Verfasser], Hartmut [Gutachter] Buhmann, and Grzegorz [Gutachter] Karczewski. "HgTe shells on CdTe nanowires: A low-dimensional topological insulator from crystal growth to quantum transport / Maximilian Kessel ; Gutachter: Hartmut Buhmann, Grzegorz Karczewski." Würzburg : Universität Würzburg, 2017. http://d-nb.info/1132995868/34.

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37

Liang, Dong. "Semiconductor Nanowires: Synthesis and Quantum Transport." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1327641946.

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38

Forino, Paola Caterina. "Nuclear magnetic resonance study of the electron doped Dirac-Mott Insulator double perovskite Ba2Na(1-x)CaxOsO6." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Osmium-based materials exhibit unconventional magnetism due to the interplay between spin orbit coupling and strong electronic correlations. In this thesis we investigate for the first time the effect of charge doping on the Dirac Mott insulator double perovskites Ba2Na(1-x)CaxOsO6 by using Nuclear Magnetic Resonance technique. We study in details the evolution of the magnetic phase diagram as a function of doping and applied magnetic field. The system rapidly evolves from a canted to a collinear antiferromagnetic ground state with a monotonic increase of the magnetic transition temperature
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39

Dauphin, Alexandre. "Cold atom quantum simulation of topological phases of matter." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209076.

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L'étude des phases de la matière est d'un intérêt fondamental en physique. La théorie de Landau, qui est le "modèle standard" des transitions de phases, caractérise les phases de la matière en termes des brisures de symétrie, décrites par un paramètre d'ordre local. Cette théorie a permis la description de phénomènes remarquables tels que la condensation de Bose-Einstein, la supraconductivité et la superfluidité.<p><p>Il existe cependant des phases qui échappent à la description de Landau. Il s'agit des phases quantiques topologiques. Celles-ci constituent un nouveau paradigme et sont caractér
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40

Foell, III Charles Alden. "Luminescent properties of Pb-based (PbX) colloidal quantum dots (CQDs) in vacuum, on silicon and integrated with a silicon-on-insulator (SOI) photonic integrated circuit (PIC)." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57665.

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In the rapidly evolving field of experimental quantum information processing, one important sub-field pursues a potentially scalable implementation that transports quantum information encoded in photons throughout “photonic circuits” fabricated in a silicon wafer. A key component is an efficient on-demand source of these single photons, and this dissertation aimed to assess the feasibility of one proposed realization of such a source by integrating few PbSe colloidal quantum dots (CQDs, demonstrated single photon emitters in nanoparticle form) into the mode volume of an optical microcavity des
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41

Ekanayake, Sobhath Ramesh Electrical Engineering &amp Telecommunications Faculty of Engineering UNSW. "Qubit control-pulse circuits in SOS-CMOS technology for a Si:P quantum computer." Publisher:University of New South Wales. Electrical Engineering & Telecommunications, 2008. http://handle.unsw.edu.au/1959.4/43096.

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Microelectronics has shaped the world beyond what was thought possible at the time of its advent. One area of current research in this field is on the solid-state Si:P-based quantum computer (QC). In this machine, each qubit requires an individually addressed fast control-pulse for non-adiabatic drive and measure operations. Additionally, it is increasingly becoming important to be able to interface nanoelectronics with complementary metal-oxide-semiconductor (CMOS) technology. In this work, I have designed and demonstrated full-custom mixed-mode and full-digital fast control-pulse generators
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42

Duchon, Eric Nicholas. "Quantum Phase Transitions in the Bose Hubbard Model and in a Bose-Fermi Mixture." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1386002245.

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43

FRANCESCHINI, PAOLO. "NOVEL SCHEMES FOR ULTRAFAST MANIPULATION OF QUANTUM MATERIALS." Doctoral thesis, Università Cattolica del Sacro Cuore, 2022. http://hdl.handle.net/10280/111822.

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La possibilità di controllare le proprietà elettroniche on-demand su una scala di tempo ultraveloce rappresenta una delle sfide più intriganti verso la realizzazione di dispositivi fotonici ed elettronici di nuova generazione. Stimolata da questo, negli ultimi decenni la ricerca scientifica ha concentrato la propria attenzione su diverse piattaforme a stato solido. Tra tutte, nanostrutture dielettriche (e metamateriali) e materiali correlati si presentano come i più promettenti candidati per la realizzazione di dispositivi dotati di nuove funzionalità. Al di là delle caratteristiche specifiche
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44

Wang, Fang. "Quantum phase transitions and fluctuations in space charge doped one unit-cell Bi2Sr2CaCu2O8+x." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS436.

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La transition supraconducteur-isolant en deux dimensions est une transition de phase quantique continue à la température du zéro absolu provoquée par des paramètres externes tels que le désordre, le champ magnétique ou la concentration de porteurs. De telles transitions ont été induites dans une variété de supraconducteurs bidimensionnels en ajustant différents paramètres externes et étudiées avec une analyse de renormalisation de taille finie. Il y a cependant assez peu d'uniformité dans les résultats car à la fois les systèmes supraconducteurs et les paramètres externes sont divers. Dans cet
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45

Monniello, Leonard. "Excitation résonante de boîtes quantiques pour la génération d'états non-classiques de la lumière." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066052/document.

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Les développements en information quantique nécessitent le contrôle et la manipulation d'états quantiques. Parmi les systèmes en physique du solide, les boîtes quantiques semiconductrices sont de bons candidats pour réaliser des bits quantiques. La taille nanométrique de ces objets conduit à un confinement spatial à trois dimensions des porteurs : le spectre d'énergie est discret comme celui d'un atome. Ces objets sont étudiés pour leurs propriétés optiques, et notamment pour l'émission de photons uniques et indiscernables, qui sont des états quantiques de la lumière. Le travail de cette thèse
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46

Santos-Cottin, David. "Propriétés électroniques et de transport du semi-métal corrélé quasi-2D BaNiS2." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066139/document.

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Ce travail de thèse a pour but de clarifier le mécanisme de la transition métal-isolant (MIT) pilotée par le dopage électronique x du système quasi-2D BaCo1-xNixS2.Une optimisation de la croissance de monocristaux pour des taux de substitution allant de x = 0 à 1 a été nécessaire. Cela a permis de synthétiser de manière reproductible des monocristaux non lacunaires en soufre, de taille millimétrique et de haute qualité. L'analyse structurale de ces cristaux a permis d'établir une relation précise entre les distances métal-soufres et le taux de substitution x.Le travail de thèse a ensuite été f
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47

Pournia, Seyyedesadaf. "Exploring the Photoresponse and Optical Selection Rules in the Semiconductor Nanowires, Topological Quantum Materials and Ferromagnetic Semiconductor Nanoflakes using Polarized Photocurrent Spectroscopy." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627666632280473.

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48

Eriksson, Hjalmar. "From the quantum Hall effect to topological insulators : A theoretical overview of recent fundamental developments in condensed matter physics." Thesis, Uppsala University, Theoretical Physics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126860.

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<p>In this overview I describe the simplest models for the quantum Hall and quantum spin Hall effects, and give some general indications as to the description of topological insulators. As a background to the theoretical models I will first trace the development leading up to the description of topological insulators . Then I will present Laughlin's original model for the quantum Hall effect and briefly discuss its limitations. After that I will describe the Kane and Mele model for the quantum spin Hall effect in graphene and discuss its relation to a general quantum spin Hall system. I will c
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49

Demion, Arnaud. "Transport électronique dans le graphène et les isolants topologiques 2D en présence de désordre magnétique." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4349.

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Dans cette thèse, nous étudions l’effet du désordre magnétique sur les propriétés de transport électronique du graphène et des isolants topologiques 2D de type HgTe. Le graphène et les isolants topologiques sont des matériaux dont les excitations électroniques sont assimilées à des fermions de Dirac sans masse. L’influence des impuretés magnétiques sur les propriétés de transport du graphène est étudiée dans le régime de forts champs électriques. En conséquence de la production de paires électron-trou, la réponse devient non linéaire et dépend de la polarisation magnétique. Nous étudions une t
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Thomas, Candice. "Strained HgTe/CdTe topological insulators, toward spintronic applications." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY090/document.

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Abstract:
Les isolants topologiques constituent une nouvelle classe de matériaux caractérisés par l'association d'un volume isolant et de surfaces conductrices. Avec des propriétés électroniques similaires au graphene, notamment un transport régit par des particules à énergie de dispersion linéaire couramment appelés fermions de Dirac ainsi qu'une protection topologique empêchant tout phénomène de rétrodiffusion, ces matériaux suscitent un intérêt grandissant dans la quête d'une électronique de faible consommation. En effet, la production de courants de spin non-dissipatifs et polarisés ainsi que la for
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