Kondo-resonance, Coulomb blockade, and Andreev transport through a quantum dot

Abstract

We study resonant tunneling through an interacting quantum dot coupled to normal metallic and superconducting leads. We show that large Coulomb interaction gives rise to novel effects in Andreev transport. Adopting an exact relation for the Green's function, we find that at zero temperature, the linear response conductance is enhanced due to Kondo-Andreev resonance in the Kondo limit, while it is suppressed in the empty site limit. In the Coulomb blockaded region, on the other hand, the conductance is reduced more than the corresponding conductance with normal leads because large charging energy suppresses Andreev reflection.

3 pages Revtex, 4 Postscript figures, accepted for publication in Phys. Rev. B

References in corpus (6)

• Random-Matrix Theory of Quantum Transport
• Kondo Physics in a Single Electron Transistor
• A Tunable Kondo Effect in Quantum Dots
• Resonant tunneling through a small quantum dot coupled to superconducting leads
• Resonant Andreev Tunneling in Strongly Interacting Quantum Dots
• Transport through an Interacting Quantum Dot Coupled to Two Superconducting Leads

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• Mesoscopic Kondo Effect in an Aharonov-Bohm Ring
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• Non-Equilibrium Josephson and Andreev Current through Interacting Quantum Dots
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• Response time of a normal-superconductor hybrid system under the step-like pulse bias
• Photon-Assisted Quasiparticle Transport and Andreev Transport through an Interacting Quantum Dot
• Fractional Josephson effect versus fractional charge in superconducting-normal metal hybrid circuits
• Driven superconducting proximity effect in interacting quantum dots
• Extraordinary Temperature Dependence of the Resonant Andreev Reflection
• Probing Hybridization of a Single Energy Level Coupled to Superconducting Leads
• Andreev Tunneling in Strongly Interacting Quantum Dots
• Ground state topology of a four-terminal superconducting double quantum dot
• Nonlinear electric and thermoelectric Andreev transport through a hybrid quantum dot coupled to ferromagnetic and superconducting leads