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 (110) or (11¯0) crystal axis of GaAs, destroys anomalous nematic states and restores quantum Hall stripe phases aligned along their native (110) direction. These findings confirm that anomalous nematic states are distinct from other ground states and will assist future theories to identify their origin.
Bibliographical noteFunding Information:
We thank G. Jones, S. Hannas, T. Murphy, J. Park, A. Suslov, and A. Bangura for technical support. Transport measurements by X.F., Q.S. and M.A.Z. were supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. ER 46640-SC0002567. Growth of GaAs/AlGaAs quantum wells at Purdue University was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award No. DE-SC0006671. Device fabrication and characterization by Minnesota group were supported by the NSF Award No. DMR-1309578. Growth of GaAs/AlGaAs quantum wells at Princeton University was, in part, by the Gordon and Betty Moore Foundation's EPiQS Initiative, Grant No. GBMF9615 to L.N.P., and by the National Science Foundation MRSEC Grant No. DMR 1420541. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreements No. DMR-1157490 and No. DMR-1644779 and the State of Florida.
© 2021 American Physical Society.