2017/07/07 by K. A. Schreiber, Katherine Schreiber, N. Samkharadze +7
Mathematics · Physics and Astronomy · #Composite fermion #Condensed matter physics #Critical point (mathematics) #Electron #Fermion #Filling factor #Fractional quantum Hall effect #Geometry #Ground state #Hydrostatic equilibrium #Hydrostatic pressure #Mathematics #Phase (matter) #Phase diagram #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Quantum critical point #Quantum mechanics #Quantum phase transition #Quantum point contact #Quantum spin Hall effect #Quantum well #Thermodynamics #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.96.041107
published as PRB 96, 041107(R) (2017)
arxiv created 2017/07/07 · openalex publication_date 2017/07/07 · openalex created_date 2017/07/14 · arxiv updated 2017/08/02 · openalex updated_date 2026/08/05
Under hydrostatic pressure, the ground state of a two-dimensional electron gas at \ensuremathν=5/2 changes from a fractional quantum Hall state to the stripe phase. By measuring the energy gap of the fractional quantum Hall state and of the onset temperature of the stripe phase, we mapped out a phase diagram of these competing phases in the pressure-temperature plane. Our data highlight the dichotomy of two descriptions of the half-filled Landau level near the quantum critical point: one based on electrons and another on composite fermions.