Influence of confining potentials on the exchange coupling in double quantum dots

Jesper Goor Pedersen, Christian Flindt, Antti-Pekka Jauho, and Niels Asger Mortensen
Phys. Rev. B 81, 193406 – Published 17 May 2010

Abstract

We report simple expressions for the exchange coupling in double quantum dots calculated within the Heitler-London and the Hund-Mulliken approximations using four different confining potentials. At large interdot distances and at large magnetic fields, the exchange coupling does not depend significantly on the details of the potentials. In contrast, at low fields and short distances, different behaviors of the exchange coupling can be attributed to particular features of the potentials. Our results may be useful as guidelines in numerical studies and in the modeling of experiments.

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  • Received 17 February 2010

DOI:https://doi.org/10.1103/PhysRevB.81.193406

©2010 American Physical Society

Authors & Affiliations

Jesper Goor Pedersen1, Christian Flindt2, Antti-Pekka Jauho3,4, and Niels Asger Mortensen1

  • 1DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Building 343, DK-2800 Kongens Lyngby, Denmark
  • 2Department of Physics, Harvard University, 17 Oxford Street, Cambridge, Massachusetts 02138, USA
  • 3DTU Nanotech, Department of Micro and Nanotechnology, Technical University of Denmark, Building 345 East, 2800 Kongens Lyngby, Denmark
  • 4Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 Aalto, Finland

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Issue

Vol. 81, Iss. 19 — 15 May 2010

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