Tunneling through the Quantum Dot Coupled between Normal and Superconducting Leads
A. Donabidowicz, T. Domański and K.I. Wysokiński
Institute of Physics, M. Curie-Skłodowska University, Radziszewskiego 10, 20-031 Lublin, Poland
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Received: 9 06 2007;
We study the charge tunneling via the quantum dot coupled to normal and superconducting leads, where the superconducting electrode has either an isotropic or anisotropic (of d-wave symmetry) energy gap. We use the single impurity Anderson model and apply the nonequilibrium Green function formalism to determine the differential tunneling conductance. The influence of the proximity effect between the quantum dot and superconductor on the transport properties of the system manifests itself in the Andreev conductance.
DOI: 10.12693/APhysPolA.112.157
PACS numbers: 73.23.-b, 74.20.Fg, 74.45.+c