Scaling analysis for Kondo effect in quantum dot embedded in Aharonov-Bohm ring

Ryosuke Yoshii, Mikio Eto

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14 Citations (Scopus)


The Kondo effect is theoretically studied in a quantum dot embedded in an Aharonov-Bohm (AB) ring when the size of the ring is much smaller than the Kondo cloud. First, we construct an equivalent model in which a quantum dot is coupled to a single lead. The AB interference effect is involved in the magnetic-flux dependence of the density of states in the lead. The scaling analysis of this model yields analytical expressions for the Kondo temperature TK and conductance at temperatures T ≫ TK. We show that TK may be significantly modulated by the magnetic flux penetrating the ring. Our method is generally applicable to the investigation of the Kondo effect in mesoscopic complex systems including a quantum dot.

Original languageEnglish
Article number123714
JournalJournal of the Physical Society of Japan
Issue number12
Publication statusPublished - 2008 Dec


  • Aharonov-Bohm ring
  • Fano effect
  • Kondo effect
  • Quantum dot
  • Scaling method

ASJC Scopus subject areas

  • General Physics and Astronomy


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