ZERO-BIAS CONDUCTANCE THROUGH SIDE-COUPLED DOUBLE QUANTUM DOTS

  • J. Bonča
  • R. žitko
Part of the NATO Science Series book series (NAII, volume 241)

Abstract

Low temperature zero-bias conductance through two side-coupled quantum dots is investigated usingWilson’s numerical renormalization group technique. A low-temperature phase diagram is computed. Near the particle-hole symmetric point localized electrons form a spin-singlet associated with weak conductance. For weak inter-dot coupling we find enhanced conductance due to the two-stage Kondo effect when two electrons occupy quantum dots . When quantum dots are populated with a single electron, the system enters the Kondo regime with enhanced conductance. Analytical expressions for the width of the Kondo regime and the Kondo temperature in this regime are given.

Keywords

Lester Haldane 

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Copyright information

© Springer 2007

Authors and Affiliations

  • J. Bonča
    • 1
  • R. žitko
    • 2
  1. 1.J. Stefan Institute Department of PhysicsFMF, University of LjubljanaLjubljanaSlovenia
  2. 2.J. Stefan InstituteLjubljanaSlovenia

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