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|Abstract:||The fractional quantum Hall state (FQHS) observed at a half-filled Landau level in an interacting two-dimensional electron system (2DES) is among the most exotic states of matter as its quasiparticles are expected to be Majorana excitations with non-Abelian statistics. We demonstrate here the unexpected presence of such a state in a novel 2DES with a strong band-mass anisotropy. The FQHS we observe has unusual characteristics. While its Hall resistance is well quantized at low temperatures, it exhibits highly anisotropic in-plane transport resembling compressible stripe or nematic charge-density-wave phases. More striking, the anisotropy sets in suddenly below a critical temperature, suggesting a finite-temperature phase transition. Our observations highlight how anisotropy modifies the many-body phases of a 2DES, and should further fuel the discussion surrounding the enigmatic even-denominator FQHS|
|Citation:||Hossain, MS, Ma, MK, Chung, YJ, Pfeiffer, LN, West, KW, Baldwin, KW, Shayegan, M. (2018). Unconventional Anisotropic Even-Denominator Fractional Quantum Hall State in a System with Mass Anisotropy. Physical Review Letters, 121 (10.1103/PhysRevLett.121.256601|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||Physical Review Letters|
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