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arXiv · 2107.11691

Anomalous nematic-to-stripe phase transition driven by in-plane magnetic fields

X. Fu·Q. Shi·M. A. Zudov·G. C. Gardner·J. D. Watson·M. J. Manfra·K. W. Baldwin·L. N. Pfeiffer·K. W. West
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Abstract

Anomalous nematic states, recently discovered in ultraclean two-dimensional electron gas, emerge from quantum Hall stripe phases upon further cooling. These states are hallmarked by a local minimum (maximum) in the hard (easy) longitudinal resistance and by an incipient plateau in the Hall resistance in nearly half-filled Landau levels. Here, we demonstrate that a modest in-plane magnetic field, applied either along $\left < 110 \right >$ or $\left < 1\bar10 \right >$ crystal axis of GaAs, destroys anomalous nematic states and restores quantum Hall stripe phases aligned along their native $\left < 110 \right >$ direction. These findings confirm that anomalous nematic states are distinct from other ground states and will assist future theories to identify their origin.

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X. Fu, Q. Shi, M. A. Zudov, G. C. Gardner, J. D. Watson, M. J. Manfra, K. W. Baldwin, L. N. Pfeiffer, K. W. West. 2021-07-24. Anomalous nematic-to-stripe phase transition driven by in-plane magnetic fields. https://doi.org/10.1103/physrevb.104.l081301

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