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

Format:

Book

Author/Creator:

Schreiber, Katherine A., author.

Contributor:

SpringerLink (Online service)

Series:

Physics and Astronomy (Springer-11651)

Springer Theses, Recognizing Outstanding Ph.D. Research,. 2190-5053

Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5053

Language:

English

Subjects (All):

Phase transformations (Statistical physics).

Optical materials.

Electronics--Materials.

Electronics.

Low temperatures.

Solid state physics.

Phase Transitions and Multiphase Systems.

Optical and Electronic Materials.

Low Temperature Physics.

Solid State Physics.

Local Subjects:

Phase Transitions and Multiphase Systems.

Optical and Electronic Materials.

Low Temperature Physics.

Solid State Physics.

Physical Description:

1 online resource (XIII, 101 pages) : 50 illustrations, 39 illustrations in color.

Edition:

First edition 2019.

Contained In:

Springer eBooks

Place of Publication:

Cham : Springer International Publishing : Imprint: Springer, 2019.

System Details:

text file PDF

Summary:

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.

Contents:

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.

Other Format:

Printed edition:

ISBN:

978-3-030-26322-5

9783030263225

Access Restriction:

Restricted for use by site license.