Quantum transport in semiconductor-superconductor microjunctions

Details Quantum transport in semiconductor-superconductor microjunctions Quantum transport in semiconductor-superconductor microjunctions

1994-06-21

arxiv.org/abs/cond-mat/9406083v2

"Mesoscopic Quantum Physics", edited by E. Akkermans, G. Montambaux, J.-L. Pichard, and J. Zinn-Justin (North-Holland, Amsterd

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

38 pages, 17 figures (included in version 2)

Scientific paper

Recent experiments on conduction between a semiconductor and a superconductor have revealed a variety of new mesoscopic phenomena. Here is a review of the present status of this rapidly developing field. A scattering theory is described which leads to a conductance formula analogous to Landauer's formula in normal-state conduction. The theory is used to identify features in the conductance which can serve as "signatures" of phase-coherent Andreev reflection, i.e. for which the phase coherence of the electrons and the Andreev-reflected holes is essential. The applications of the theory include a quantum point contact, quantum dot, weak localization, universal conductance fluctuations, shot noise, and reflectionless tunneling. This review is based on lectures at the Les Houches summer school, Session LXI, 1994.

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