Multiparameter scaling of the Kondo effect in quantum dots with an even number of electrons

Mikio Eto, Yuli V. Nazarov

研究成果: Article査読

17 被引用数 (Scopus)

抄録

We address a recent theoretical discrepancy concerning the Kondo effect in quantum dots with an even number of electrons where spin-singlet and -triplet states are nearly degenerate. We show that the discrepancy arises from the fact that the Kondo scaling involves many parameters, which makes the results depend on concrete microscopic models. We illustrate this by the scaling calculations of the Kondo temperature TK as a function of the energy difference between the singlet and triplet states Δ. TK(Δ) decreases with increasing A, showing a crossover from a power law with a universal exponent to that with a nonuniversal exponent. The crossover depends on the initial parameters of the model.

本文言語English
論文番号153319
ページ(範囲)1533191-1533194
ページ数4
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
66
15
出版ステータスPublished - 2002 10 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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