Two-impurity Anderson model revisited

Competition between Kondo effect and reservoir-mediated superexchange in double quantum dots

Minchul Lee, Mahn-Soo Choi, Rosa López, Ramón Aguado, Jan Martinek, Rok Žitko

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We study a series-coupled double quantum dot in the Kondo regime modeled by the two-impurity Anderson model and find a conduction-band-mediated superexchange interaction that competes with Kondo physics in the strong Coulomb interaction limit. Our numerical renormalization-group results complemented with the higher-order Rayleigh-Schrödinger perturbation theory show that the exchange mechanism leads to clear experimental consequences that can be checked in transport measurements through double quantum dots.

Original languageEnglish
Article number121311
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number12
DOIs
Publication statusPublished - 2010 Mar 29

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Kondo effect
Semiconductor quantum dots
quantum dots
Impurities
impurities
Coulomb interactions
Conduction bands
conduction bands
Physics
perturbation theory
interactions
physics

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Two-impurity Anderson model revisited : Competition between Kondo effect and reservoir-mediated superexchange in double quantum dots. / Lee, Minchul; Choi, Mahn-Soo; López, Rosa; Aguado, Ramón; Martinek, Jan; Žitko, Rok.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 12, 121311, 29.03.2010.

Research output: Contribution to journalArticle

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