Conserved spin quantity in strained hole systems with Rashba and Dresselhaus spin-orbit coupling

Paul Wenk, Michael Kammermeier, and John Schliemann
Phys. Rev. B 93, 115312 – Published 21 March 2016

Abstract

We derive an effective Hamiltonian for a (001)-confined quasi-two-dimensional hole gas in a strained zinc-blende semiconductor heterostructure including both Rashba and Dresselhaus spin-orbit coupling. In the presence of uniaxial strain along the 110 axes, we find a conserved spin quantity in the vicinity of the Fermi contours in the lowest valence subband. In contrast to previous works, this quantity meets realistic requirements for the Luttinger parameters. For more restrictive conditions, we even find a conserved spin quantity for vanishing strain, restricted to the vicinity of the Fermi surface.

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  • Received 8 August 2015
  • Revised 25 January 2016

DOI:https://doi.org/10.1103/PhysRevB.93.115312

©2016 American Physical Society

Authors & Affiliations

Paul Wenk*, Michael Kammermeier, and John Schliemann

  • Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany

  • *paul.wenk@ur.de

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Vol. 93, Iss. 11 — 15 March 2016

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