Katherine A. Schreiber Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure 9783030263218

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Автор: Katherine A. Schreiber
Название: Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure
ISBN: 9783030263218
Издательство: Springer
Классификация:

Физика низких температур

Физика конденсированных сред (физика веществ в жидком и твёрдом состоянии)

Электронные устройства и материалы

ISBN-10: 3030263215
Обложка/Формат: Hardcover
Страницы: 101
Вес: 0.35 кг.
Дата издания: 2019
Серия: Springer Theses
Язык: English
Издание: 1st ed. 2019
Иллюстрации: 50 tables, color; 39 illustrations, color; 11 illustrations, black and white; xiii, 101 p. 50 illus., 39 illus. in color.
Размер: 234 x 156 x 8
Читательская аудитория: Professional & vocational
Основная тема: Physics
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание: 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 ? = 5/2 and ? = 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.
Дополнительное описание: 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 Und

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