Article

Quantum transport in superconductor–semiconductor junctions

NTT Basic Research Laboratories, 3-1, Morinosato-Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
Physica C Superconductivity (Impact Factor: 0.72). 04/2001; DOI: 10.1016/S0921-4534(01)00002-8

ABSTRACT Experimental and theoretical results of quantum transport in superconductor–semiconductor junctions are summarized. We will first show the experimental results of reentrant behavior of the conductance as well as of giant Andreev backscattering. Then Andreev reflection in the quantum Hall regime is described. The charging effect on the proximity correction is finally discussed.

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    ABSTRACT: The quantum transport characteristics of a mesoscopic system are studied. Using the WKB method the current density was derived due to both, normal tunneling and Andreev reflection processes. The tunneling process was treated as a stochastic process, therefore, the energies of the tunneled electrons and the value of the Schottky barrier height at the S–Sm interface are determined by using a Monte-Carlo simulation technique. Numerical calculation of the current has been performed at different temperatures and bias voltage. The obtained results fit nicely with the experimental results in the literature. These results are very important for nanotechnology applications.
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