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arXiv · 0704.2215

Impact of spin-orbit coupling on quantum Hall nematic phases

M. J. Manfra·R. de Picciotto·Z. Jiang·S. H. Simon·L. N. Pfeiffer·K. W. West·A. M. Sergent
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Abstract

Anisotropic charge transport is observed in a two-dimensional (2D) hole system in a perpendicular magnetic field at filling factors nu=7/2, nu=11/2, and nu=13/2 at low temperature. In stark contrast, the transport at nu=9/2 is isotropic for all temperatures. Isotropic hole transport at nu=7/2 is restored for sufficiently low 2D densities or an asymmetric confining potential. The density and symmetry dependences of the observed anisotropies suggest that strong spin-orbit coupling in the hole system contributes to the unusual transport behavior.

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M. J. Manfra, R. de Picciotto, Z. Jiang, S. H. Simon, L. N. Pfeiffer, K. W. West, A. M. Sergent. 2007-04-17. Impact of spin-orbit coupling on quantum Hall nematic phases. https://doi.org/10.1103/physrevlett.98.206804

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