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Indirect coupling between spins in semiconductor quantum dots

G. Ramon, Y. Lyanda-Geller, T. L. Reinecke, and L. J. Sham
Phys. Rev. B 71, 121305(R) – Published 16 March 2005

Abstract

The optically induced indirect exchange interaction between spins in two quantum dots is investigated theoretically. We give a microscopic formulation of the interaction between the localized spin and the itinerant carriers, which is the basis of the indirect coupling, including the effects of correlation using a set of canonical transformations. Correlation effects are found to be of comparable magnitude to the direct exchange. We give quantitative results for the indirect spin-spin coupling for realistic quantum dot geometries and find the largest couplings for one-dimensional systems.

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  • Received 3 December 2004

DOI:https://doi.org/10.1103/PhysRevB.71.121305

©2005 American Physical Society

Authors & Affiliations

G. Ramon1,*, Y. Lyanda-Geller1,†, T. L. Reinecke1, and L. J. Sham2

  • 1Naval Research Laboratory, Washington, D.C. 20375-5320, USA
  • 2Department of Physics, University of California—San Diego, La Jolla, California 92093-0319, USA

  • *Electronic address: ramon@bloch.nrl.navy.mil
  • Current address: Department of Physics, Purdue University, West Lafayette, Indiana 47907.

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Issue

Vol. 71, Iss. 12 — 15 March 2005

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