Influence of the pair coherence on the charge tunneling through a quantum dot connected to a superconducting lead
T. Domanski A. Donabidowicz, K. I. Wysokinski
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 Tc) or incoherent objects (in a region Tc < T < T*). This situation can be achieved in practice if one uses the high Tc superconducting material where various precursor effects have been observed upon approaching Tc 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.
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