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

References in corpus (4)

• Scanning tunneling spectroscopy of high-temperature superconductors
• Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+d
• Numerical Renormalization Group Approach to a Quantum Dot Coupled to Normal and Superconducting Leads
• Role of Inelastic Tunneling through the Barrier in Scanning Tunneling Microscope Experiments on Cuprates

Cited by in corpus (6)

• Andreev Transport through Side-Coupled Double Quantum Dots
• Nonequilibrium transport via spin-induced sub-gap states in superconductor/quantum dot/normal metal cotunnel junctions
• Spin-polarized Andreev transport influenced by Coulomb repulsion through two quantum dot system
• Meservey-Tedrow-Fulde effect in a quantum dot embedded between metallic and superconducting electrodes
• Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads
• Quantum Monte Carlo study of nonequilibrium transport through a quantum dot coupled to normal and superconducting leads