Metastable Resistance Anisotropy Orientation of Two-Dimensional Electrons in High Landau Levels

Details Metastable Resistance Anisotropy Orientation of Two-Dimensional Electrons in High Landau Levels Metastable Resistance Anisotropy Orientation of Two-Dimensional Electrons in High Landau Levels

2003-09-26

arxiv.org/abs/cond-mat/0309625v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures. Figure references corrected. Version accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.026806

In half-filled high Landau levels, two-dimensional electron systems possess collective phases which exhibit a strongly anisotropic resistivity tensor. A weak, but as yet unknown, rotational symmetry-breaking potential native to the host semiconductor structure is necessary to orient these phases in macroscopic samples. Making use of the known external symmetry-breaking effect of an in-plane magnetic field, we find that the native potential can have two orthogonal local minima. It is possible to initialize the system in the higher minimum and then observe its relaxation toward equilibrium.

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