Kondo temperature of SU(4) symmetric quantum dots

2014/04/30 by Michele Filippone, Cătălin Paşcu Moca, Catalin Pascu Moca +3 · 23 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Impurity #Kondo effect #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.90.121406

published in Physical Review B 90(12) (American Physical Society) · 4 pages, 5 figures and Suppl. Material

arxiv created 2014/05/13 · openalex publication_date 2014/09/25 · arxiv updated 2014/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

A path integral approach is used to derive a closed analytical expression for the Kondo temperature of the SU(4) symmetrical Anderson model. In contrast to the SU(2) case, the prefactor of the Kondo temperature is found to display a peculiar orbital-energy (gate voltage) dependence, reflecting the presence of various SU(4) mixed valence fixed points. Our analytical expressions are tested against and confirmed by numerical renormalization group computations.

Citations

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• Theory of the atomic limit of the Anderson model. I. Perturbation expansions re-examined
• Scaling Theory of the Asymmetric Anderson Model
• Density matrix numerical renormalization group for non-Abelian symmetries
• Resistance Minimum in Dilute Magnetic Alloys