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arXiv · 1302.6304

Evidence for a $ν=5/2$ Fractional Quantum Hall Nematic State in Parallel Magnetic Fields

Yang Liu·S. Hasdemir·M. Shayegan·L. N. Pfeiffer·K. W. West·K. W. Baldwin
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Abstract

We report magneto-transport measurements for the fractional quantum Hall state at filling factor $ν=$ 5/2 as a function of applied parallel magnetic field ($B_{||}$). As $B_{||}$ is increased, the 5/2 state becomes increasingly anisotropic, with the in-plane resistance along the direction of $B_{||}$ becoming more than 30 times larger than in the perpendicular direction. Remarkably, the resistance anisotropy ratio remains constant over a relatively large temperature range, yielding an energy gap which is the same for both directions. Our data are qualitatively consistent with a fractional quantum Hall \textit{nematic} phase.

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Yang Liu, S. Hasdemir, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin. 2013-02-26. Evidence for a $ν=5/2$ Fractional Quantum Hall Nematic State in Parallel Magnetic Fields. https://doi.org/10.1103/physrevb.88.035307

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