Finite Temperature Density Instability at High Landau Level Occupancy

Details Finite Temperature Density Instability at High Landau Level Occupancy Finite Temperature Density Instability at High Landau Level Occupancy

1999-05-10

arxiv.org/abs/cond-mat/9905116v4

Phys. Rev. Lett. vol. 84, 1288 (2000)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 eps figures. We show explicitly that a transition from perpendicular to parallel stripes (relative to the in-plane

Scientific paper

10.1103/PhysRevLett.84.1288

We study here the onset of charge density wave instabilities in quantum Hall systems at finite temperature for Landau level filling $\nu>4$. Specific emphasis is placed on the role of disorder as well as an in-plane magnetic field. Beyond some critical value, disorder is observed to suppress the charge density wave melting temperature to zero. In addition, we find that a transition from perpendicular to parallel stripes (relative to the in-plane magnetic field) exists when the electron gas thickness exceeds $\approx 60$\AA. The perpendicular alignment of the stripes is in agreement with the experimental finding that the easy conduction direction is perpendicular to the in-plane field.

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