Nonequilibrium Dynamics of Andreev States in the Kondo Regime
A. Levy Yeyati, A. Martín-Rodero, E. Vecino
DOI 10.1103/PhysRevLett.91.266802 · Physical Review Letters
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Abstract
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 nonequilibrium 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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