LEADER 04469nam 22006375 450 001 9910349510103321 005 20200704142934.0 010 $a3-030-26322-3 024 7 $a10.1007/978-3-030-26322-5 035 $a(CKB)4100000009184976 035 $a(DE-He213)978-3-030-26322-5 035 $a(MiAaPQ)EBC5892520 035 $a(PPN)258304685 035 $a(EXLCZ)994100000009184976 100 $a20190904d2019 u| 0 101 0 $aeng 135 $aurnn|008mamaa 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aGround States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure /$fby Katherine A. Schreiber 205 $a1st ed. 2019. 210 1$aCham :$cSpringer International Publishing :$cImprint: Springer,$d2019. 215 $a1 online resource (XIII, 101 p. 50 illus., 39 illus. in color.) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 311 $a3-030-26321-5 327 $aChapter 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. 330 $aThis thesis presents the discovery of a surprising phase transition between a topological and a broken symmetry phase. Phase transitions between broken symmetry phases involve a change in symmetry and those between topological phases require a change in topological order; in rare cases, however, transitions may occur between these two broad classes of phases in which the vanishing of the topological order is accompanied by the emergence of a broken symmetry. This thesis describes observations of such a special phase transition in the two-dimensional electron gas confined in the GaAs/AlGaAs structures. When tuned by hydrostatic pressure, the ? = 5/2 and ? = 7/2 fractional quantum Hall states, believed to be prototypical non-Abelian topological phases of the Pfaffian universality class, give way to an electronic nematic phase. Remarkably, the fractional quantum Hall states involved are due to pairing of emergent particles called composite fermions. The findings reported here, therefore, provide an interesting example of competition of pairing and nematicity. This thesis provides an introduction to quantum Hall physics of the two-dimensional electron gas, contains details of the high pressure experiments, and offers a discussion of the ramifications and of the origins of the newly reported phase transition. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053 606 $aPhase transitions (Statistical physics) 606 $aOptical materials 606 $aElectronic materials 606 $aLow temperature physics 606 $aLow temperatures 606 $aSolid state physics 606 $aPhase Transitions and Multiphase Systems$3https://scigraph.springernature.com/ontologies/product-market-codes/P25099 606 $aOptical and Electronic Materials$3https://scigraph.springernature.com/ontologies/product-market-codes/Z12000 606 $aLow Temperature Physics$3https://scigraph.springernature.com/ontologies/product-market-codes/P25130 606 $aSolid State Physics$3https://scigraph.springernature.com/ontologies/product-market-codes/P25013 615 0$aPhase transitions (Statistical physics). 615 0$aOptical materials. 615 0$aElectronic materials. 615 0$aLow temperature physics. 615 0$aLow temperatures. 615 0$aSolid state physics. 615 14$aPhase Transitions and Multiphase Systems. 615 24$aOptical and Electronic Materials. 615 24$aLow Temperature Physics. 615 24$aSolid State Physics. 676 $a530.474 676 $a537.6226 700 $aSchreiber$b Katherine A$4aut$4http://id.loc.gov/vocabulary/relators/aut$0837286 906 $aBOOK 912 $a9910349510103321 996 $aGround States of the Two-Dimensional Electron System at Half-Filling under Hydrostatic Pressure$91870753 997 $aUNINA