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Transverse magnetic focusing and the dispersion of GaAs 2D holes at (311)A heterojunctions

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
305
Identifiers
DOI: 10.1016/0039-6028(94)90914-8
Disciplines
  • Physics

Abstract

Abstract We report transverse magnetic focusing experiments on two-dimensional hole systems confined in square and triangular quantum wells grown on (311)A GaAs substrates. The focusing barriers arc oriented along different crystallographic directions and allow us to derive the constant energy contours in K-space. The results indicate a nearly elliptical shape for these contours which we interpret in light of a lateral surface superlatticc induced by corrugations at the heterojunction.

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