Spin relaxation in quantum dots with random spin-orbit coupling

E. Ya. Sherman and D. J. Lockwood
Phys. Rev. B 72, 125340 – Published 27 September 2005

Abstract

We investigate the longitudinal spin relaxation arising due to spin-flip transitions accompanied by phonon emission in quantum dots where the strength of the Rashba spin-orbit coupling is a random function of the lateral (in-plane) coordinate on the spatial nanoscale. In this case the Rashba contribution to the spin-orbit coupling cannot be completely removed by applying a uniform external bias across the quantum dot plane. Due to the remnant random contribution, the spin relaxation rate cannot be decreased by more than two orders of magnitude even when the external bias fully compensates the regular part of the spin-orbit coupling.

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  • Received 2 June 2005

DOI:https://doi.org/10.1103/PhysRevB.72.125340

©2005 American Physical Society

Authors & Affiliations

E. Ya. Sherman

  • Department of Physics and Institute of Optical Sciences, University of Toronto, 60 St. George Street, Toronto, Canada M5S 1A7, Ontario

D. J. Lockwood

  • Institute for Microstructural Sciences, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario, Canada K1A 0R6

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Vol. 72, Iss. 12 — 15 September 2005

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