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Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure/ by Katherine A. Schreiber.
作者:	Schreiber, Katherine A.
面頁冊數:	XIII, 101 p. 50 illus., 39 illus. in color.online resource. :
Contained By:	Springer Nature eBook
標題:	Phase transitions (Statistical physics). -
電子資源:	https://doi.org/10.1007/978-3-030-26322-5
ISBN:	9783030263225

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

Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure[electronic resource] /by Katherine A. Schreiber. - 1st ed. 2019. - XIII, 101 p. 50 illus., 39 illus. in color.online resource. - Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053. - Springer Theses, Recognizing Outstanding Ph.D. Research,.

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.

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.

ISBN: 9783030263225

Standard No.: 10.1007/978-3-030-26322-5doiSubjects--Topical Terms:

1254301
Phase transitions (Statistical physics).

LC Class. No.: QC173.45-173.458

Dewey Class. No.: 530.474

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