Phys. Rev. Lett. 100, 096803 (2008) [4 pages]Strain-Induced Fermi Contour Anisotropy of GaAs 2D holesReceived 6 September 2007; published 7 March 2008 We report measurements of magnetoresistance commensurability peaks, induced by a square array of antidots, in GaAs (311)A two-dimensional holes as a function of applied in-plane strain. The data directly probe the shapes of the Fermi contours of the two spin subbands that are split thanks to the spin-orbit interaction and strain. The experimental results are in quantitative agreement with the predictions of accurate energy band calculations, and reveal that the majority spin subband has a severely distorted Fermi contour whose anisotropy can be tuned with strain. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.096803
DOI:
10.1103/PhysRevLett.100.096803
PACS:
73.23.Ad, 71.70.Ej, 72.25.Dc
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