Nonequilibrium Dynamics of Andreev States in the Kondo Regime

2003/10/23 by A. Levy Yeyati, A. Martin-Rodero, A. Martín‐Rodero +2 · 5 citations
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.91.266802

published as Phys. Rev. Lett. 91, 266802 (2003) · Revtex4, 4 pages, 4 figures

arxiv created 2003/10/23 · openalex publication_date 2003/12/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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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