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Probing the band structure of a two-dimensional hole gas using a one-dimensional superlattice

B. Brosh, M. Y. Simmons, S. N. Holmes, A. R. Hamilton, D. A. Ritchie, and M. Pepper
Phys. Rev. B 54, R14273(R) – Published 15 November 1996
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Abstract

Using a one-dimensional superlattice we have mapped out the Fermi surface of a two-dimensional (2D) hole gas in a GaAs/AlxGa1xAs heterojunction grown on the (311)A surface of GaAs. This follows our observation of commensurability magnetoresistance oscillations from a weakly one-dimensionally modulated (311)A 2D hole gas that is confined to square and triangular quantum wells. The dependence of the oscillations on the modulation direction in the (311)A plane reflects its known k-space anisotropy. This method is a minimally invasive probe of the Fermi surface of high-mobility 2D systems. © 1996 The American Physical Society.

  • Received 12 June 1996

DOI:https://doi.org/10.1103/PhysRevB.54.R14273

©1996 American Physical Society

Authors & Affiliations

B. Brosh, M. Y. Simmons, S. N. Holmes, A. R. Hamilton, D. A. Ritchie, and M. Pepper

  • Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom

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Vol. 54, Iss. 20 — 15 November 1996

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