Transport in coupled quantum dots: Kondo effect versus antiferromagnetic correlation

C. A. Büsser, E. V. Anda, A. L. Lima, Maria A. Davidovich, and G. Chiappe
Phys. Rev. B 62, 9907 – Published 15 October 2000
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Abstract

The interplay between the Kondo effect and the interdot magnetic interaction in a coupled-dot system is studied. An exact result for the transport properties at zero temperature is obtained by diagonalizing a cluster, composed by the double dot and its vicinity, which is connected to leads. It is shown that the system goes continuously from the Kondo regime to an antiferromagnetic state as the interdot interaction is increased. The conductance, the charge at the dots, and the spin-spin correlation are obtained as a function of the gate potential.

  • Received 29 November 1999

DOI:https://doi.org/10.1103/PhysRevB.62.9907

©2000 American Physical Society

Authors & Affiliations

C. A. Büsser1, E. V. Anda1, A. L. Lima1, Maria A. Davidovich1, and G. Chiappe2

  • 1Departamento de Física, Pontificia Universidade Católica do Rio de Janeiro, Caixa Postal 38071-970, Rio de Janeiro, RJ, Brazil
  • 2Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires Ciudad Universitaria, 1428, Buenos Aires, Argentina

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Vol. 62, Iss. 15 — 15 October 2000

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