Anisotropic Transport of Two-Dimensional Holes in High Landau Levels

M. Shayegan, H. C. Manoharan, S. J. Papadakis, E. P. DePoortere

Published 1999-03-28, updated 1999-08-20Version 2

Magnetoresistance data taken along $[\bar{2}33]$ and $[01\bar{1}]$ directions in a GaAs/AlGaAs two-dimensional hole sample with van der Pauw geometry exhibit significant anisotropy at half-integer filling factors. The anisotropy appears to depend on both the density and symmetry of the hole charge distribution.