Spintronics in quantum dots: Kondo effect in quantum dots with two orbitals and spin 1/2 - Crossover from SU(4) to SU(2) symmetry

研究成果: Chapter

抄録

Kondo effect is theoretically studied in quantum dots with two orbitals and spin 1/2. We evaluate the Kondo temperature TKas a function of energy difference Δ between the orbitals using the scaling method. We find that TKis maximal around the degeneracy point (Δ = 0) and decreases with increasing |Δ| by a power law. This behavior of TKis understood as a crossover from SU(4) to SU(2) Kondo effect. The calculated results agree with recent experimental results.

本文言語English
ホスト出版物のタイトルRealizing Controllable Quantum States: Mesoscopic Superconductivity and Spintronics - In the Light of Quantum Computation
出版社World Scientific Publishing Co.
ページ451-456
ページ数6
ISBN(印刷版)9789812701619, 9789812564689
DOI
出版ステータスPublished - 2005 1 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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