Impact of spin-orbit coupling on quantum Hall nematic phases

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 res...

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Bibliographic Details
Published in:Physical review letters 2007-05, Vol.98 (20), p.206804-206804, Article 206804
Main Authors: Manfra, M J, de Picciotto, R, Jiang, Z, Simon, S H, Pfeiffer, L N, West, K W, Sergent, A M
Format: Article
Language:English
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Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.98.206804