04471nam 22006255 450 991034951010332120200704142934.03-030-26322-310.1007/978-3-030-26322-5(CKB)4100000009184976(DE-He213)978-3-030-26322-5(MiAaPQ)EBC5892520(PPN)258304685(EXLCZ)99410000000918497620190904d2019 u| 0engurnn|008mamaatxtrdacontentcrdamediacrrdacarrierGround States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure[electronic resource] /by Katherine A. Schreiber1st ed. 2019.Cham :Springer International Publishing :Imprint: Springer,2019.1 online resource (XIII, 101 p. 50 illus., 39 illus. in color.) Springer Theses, Recognizing Outstanding Ph.D. Research,2190-50533-030-26321-5 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.Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053Phase transitions (Statistical physics)Optical materialsElectronic materialsLow temperature physicsLow temperaturesSolid state physicsPhase Transitions and Multiphase Systemshttps://scigraph.springernature.com/ontologies/product-market-codes/P25099Optical and Electronic Materialshttps://scigraph.springernature.com/ontologies/product-market-codes/Z12000Low Temperature Physicshttps://scigraph.springernature.com/ontologies/product-market-codes/P25130Solid State Physicshttps://scigraph.springernature.com/ontologies/product-market-codes/P25013Phase 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.530.474Schreiber Katherine Aauthttp://id.loc.gov/vocabulary/relators/aut837286BOOK9910349510103321Ground States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure1870753UNINA