Michele Filippone, Catalin Pascu Moca, Gergely Zarand, Christophe Mora
Published 2014-04-14, updated 2014-05-13Version 2
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.
Comments: 4 pages, 5 figures and Suppl. Material
Kondo temperature of a quantum dot
Kondo Temperature Evaluated from Linear Conductance in Magnetic Fields
Semiclassical transport in nearly symmetric quantum dots I: symmetry-breaking in the dot
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