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Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure / / by Katherine A. Schreiber



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Autore: Schreiber Katherine A Visualizza persona
Titolo: Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure / / by Katherine A. Schreiber Visualizza cluster
Pubblicazione: Cham : , : Springer International Publishing : , : Imprint : Springer, , 2019
Edizione: 1st ed. 2019.
Descrizione fisica: 1 online resource (XIII, 101 p. 50 illus., 39 illus. in color.)
Disciplina: 530.474
537.6226
Soggetto topico: Phase transitions (Statistical physics)
Optical materials
Electronic materials
Low temperature physics
Low temperatures
Solid state physics
Phase Transitions and Multiphase Systems
Optical and Electronic Materials
Low Temperature Physics
Solid State Physics
Nota di contenuto: Chapter 1 Introduction -- Chapter 2 The Quantum Hall Nematic Phase -- Chapter 3 Low Temperature Measurement Techniques -- Chapter 4 The Quantum Hall Effect and Hydrostatic Pressure -- Chapter 5 The Fractional Quantum Hall State-to-Nematic Phase Transition Under Hydrostatic Pressure -- Chapter 6 Universality of the Fractional Quantum Hall State-to-Nematic Phase Transition at Half-Filling in the Second Landau Level -- Chapter 7 Origin of the Fractional Quantum Hall State-to-Nematic Phase Transition in the Second Landau Level -- References.
Sommario/riassunto: This thesis presents the discovery of a surprising phase transition between a topological and a broken symmetry phase. Phase transitions between broken symmetry phases involve a change in symmetry and those between topological phases require a change in topological order; in rare cases, however, transitions may occur between these two broad classes of phases in which the vanishing of the topological order is accompanied by the emergence of a broken symmetry. This thesis describes observations of such a special phase transition in the two-dimensional electron gas confined in the GaAs/AlGaAs structures. When tuned by hydrostatic pressure, the ν = 5/2 and ν = 7/2 fractional quantum Hall states, believed to be prototypical non-Abelian topological phases of the Pfaffian universality class, give way to an electronic nematic phase. Remarkably, the fractional quantum Hall states involved are due to pairing of emergent particles called composite fermions. The findings reported here, therefore, provide an interesting example of competition of pairing and nematicity. This thesis provides an introduction to quantum Hall physics of the two-dimensional electron gas, contains details of the high pressure experiments, and offers a discussion of the ramifications and of the origins of the newly reported phase transition.
Titolo autorizzato: Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure  Visualizza cluster
ISBN: 3-030-26322-3
Formato: Materiale a stampa
Livello bibliografico Monografia
Lingua di pubblicazione: Inglese
Record Nr.: 9910349510103321
Lo trovi qui: Univ. Federico II
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Serie: Springer Theses, Recognizing Outstanding Ph.D. Research, . 2190-5053