Non-equilibrium dynamics of Andreev states in the Kondo regime

A. Levy Yeyati; A. Martin-Rodero; E. Vecino

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Non-equilibrium dynamics of Andreev states in the Kondo regime

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arxiv cond-mat/0310554 v1 pith:HJ7UMYHS submitted 2003-10-23 cond-mat.mes-hall cond-mat.supr-con

A. Levy Yeyati , A. Martin-Rodero , E. Vecino This is my paper

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The transport properties of a quantum dot coupled to superconducting leads are analyzed. It is shown that the quasiparticle current in the Kondo regime is determined by the non-equilibrium dynamics of subgap states (Andreev states) under an applied voltage. The current at low bias is suppressed exponentially for decreasing Kondo temperature in agreement with recent experiments. We also predict novel interference effects due to multiple Landau-Zener transitions between Andreev states.

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