Resonant Andreev Tunneling in Strongly Interacting Quantum Dots
Rosario Fazio, Roberto Raimondi
TL;DR
This paper investigates how strong electron interactions in a quantum dot influence resonant Andreev tunneling, revealing an enhancement of the Kondo effect in transport properties due to superconductivity.
Contribution
It provides a new formula for Andreev current in strongly interacting quantum dots and explores the impact of the Kondo resonance on tunneling in nonperturbative regimes.
Findings
Enhanced Kondo anomaly in I-V characteristics due to superconducting lead
Derived a nonperturbative formula for Andreev current
Demonstrated interplay between Kondo effect and superconductivity
Abstract
We study resonant Andreev tunneling through a strongly interacting quantum dot connected to a normal and to a superconducting lead. We obtain a formula for the Andreev current and apply it to discuss the linear and non-linear transport in the nonperturbative regime, where the effects of the Kondo resonance on the two particle tunneling arise. In particular we notice an enhancement of the Kondo anomaly in the characteristics due to the superconducting electrode.
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