Field-tilt Anisotropy Energy in Quantum Hall Stripe States

Abstract

Recently reported giant anisotropy in the longitudinal resistivity of a 2D electron system with valence Landau level index $N\ge 2$ has been interpreted as a signal of unidirectional charge density wave (UCDW) ground states. We report on detailed Hartree-Fock calculations of the UCDW orientation energy induced by a tilted magnetic field. We find that for current experimental samples stripes are oriented perpendicular to the in-plane field, consistent with experiment. For wider 2D electron systems we predict tilt-induced stripe states with variable anisotropy energy sign.

4 pages, 2 tables, 2 figures, minor changes

References in corpus (1)

• Unlocking Transition for Modulated Surfaces and Quantum Hall Stripes

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