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Non-Equilibrium Transport through a Kondo-Dot in a Magnetic Field: Perturbation Theory and Poor Man's Scaling | | A. Rosch
; J. Paaske
; J. Kroha
; P. Wölfle
; | | Date: |
22 Feb 2002 | | Journal: | Phys. Rev. Lett. 90, 076804 (2003) | | Subject: | Strongly Correlated Electrons; Mesoscopic Systems and Quantum Hall Effect | cond-mat.str-el cond-mat.mes-hall | | Abstract: | We consider electron transport through a quantum dot described by the Kondo model in the regime of large transport voltage V in the presence of a magnetic field B with max(V,B) >> T_K. The electric current I and the local magnetization M are found to be universal functions of V/T_K and B/T_K, where T_K is the equilibrium Kondo temperature. We present a generalization of the perturbative renormalization group to frequency dependent coupling functions, as necessitated by the structure of bare perturbation theory. We calculate I and M within a poor man’s scaling approach and find excellent agreement with experiment. | | Source: | arXiv, cond-mat/0202404 | | Services: | Forum | Review | PDF | Favorites | |
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