Impact of spin-orbit coupling on quantum Hall nematic phases |
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Authors: | Manfra M J de Picciotto R Jiang Z Simon S H Pfeiffer L N West K W Sergent A M |
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Institution: | Bell Laboratories, Alcatel-Lucent, Murray Hill, New Jersey 07974, USA. |
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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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