Dynamical spin-electric coupling in a quantum dot

L. S. Levitov and E. I. Rashba
Phys. Rev. B 67, 115324 – Published 24 March 2003
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Abstract

Due to the spin-orbital coupling in an anisotropic semiconductor quantum dot, a freely precessing electron spin produces a time-dependent charge density. This creates a sizable electric field outside the dot, leading to promising applications in spintronics. The spin-electric coupling can be employed for noninvasive single-spin detection by electrical methods. We also consider a spin relaxation mechanism due to long-range coupling to electrons in gates and elsewhere in the system, and find a contribution comparable to, and in some cases dominant over, previously discussed mechanisms.

  • Received 30 September 2002

DOI:https://doi.org/10.1103/PhysRevB.67.115324

©2003 American Physical Society

Authors & Affiliations

L. S. Levitov1 and E. I. Rashba1,2,*

  • 1Department of Physics, Center for Materials Sciences & Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
  • 2Department of Physics, SUNY at Buffalo, Buffalo, New York 14260

  • *Email: erashba@mailaps.org

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Issue

Vol. 67, Iss. 11 — 15 March 2003

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