Influence of the pair coherence on the charge tunneling through a quantum dot connected to a superconducting lead

Abstract

We analyze the charge transport through a single level quantum dot coupled to a normal (N) and superconducting (S) leads where the electron pairs exist either as the coherent (for temperatures below T_c) or incoherent objects (in a region T_c < T < T*). This situation can be achieved in practice if one uses the high T_c superconducting material where various precursor effects have been observed upon approaching $T_c$ from above. Without restricting to any particular microscopic mechanism we investigate some qualitative changes of the nonequilibrium charge current caused by the electron pair coherence.

7 pages, 9 figures

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• Interplay between Kondo and Andreev-Josephson effects in a quantum dot coupled to one normal and two superconducting leads
• Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
• Meservey-Tedrow-Fulde effect in a quantum dot embedded between metallic and superconducting electrodes
• Correlated electron transport through double quantum dots coupled to normal and superconducting leads
• Interplay between direct and crossed Andreev reflections in hybrid nano-structures
• Andreev reflection through Fano resonances in molecular wires
• Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads
• Fano effect and Andreev bound states in T-shape double quantum dots
• Quantum Monte Carlo study of nonequilibrium transport through a quantum dot coupled to normal and superconducting leads
• Fano-Andreev effect in T-shape double-quantum-dot in the Kondo regime
• Replicas of the Fano resonances induced by phonons in a subgap Andreev tunneling
• Inelastic Kondo-Andreev tunnelings in a vibrating quantum dot
• Fano resonance in a normal metal/ferromagnet-quantum dot-superconductor device
• Unconventional particle-hole mixing in the systems with strong superconducting fluctuations
• Transport properties for a quantum dot coupled to normal leads with pseudogap
• Nonequilibrium transport through a quantum dot coupled to normal and superconducting leads