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Density Induced Interchange of Anisotropy Axes at Half-Filled High Landau Levels

J. Zhu·W. Pan·H. L. Stormer·L. N. Pfeiffer·K. W. West
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Abstract

We observe density induced 90$^{\circ}$ rotations of the anisotropy axes in transport measurements at half-filled high Landau levels in the two dimensional electron system, where stripe states are proposed ($ν$=9/2, 11/2, etc). Using a field effect transistor, we find the transition density to be $2.9\times10^{11}$cm$^{-2}$ at $ν$=9/2. Hysteresis is observed in the vicinity of the transition. We construct a phase boundary in the filling factor-magnetic field plane in the regime $4.4<ν<4.6$. An in-plane magnetic field applied along either anisotropy axis always stabilizes the low density orientation of the stripes.

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J. Zhu, W. Pan, H. L. Stormer, L. N. Pfeiffer, K. W. West. 2002-03-09. Density Induced Interchange of Anisotropy Axes at Half-Filled High Landau Levels. https://doi.org/10.1103/physrevlett.88.116803

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