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Phys. Rev. B 46, 12841 - 12844 (1992)

Quantum transport in semiconductor-superconductor microjunctions

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C. W. J. Beenakker
Instituut-Lorentz, University of Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands

Rapid Communication Received 8 September 1992

A formula is derived that relates the conductance of a normal-metal–superconductor (NS) junction to the single-electron transmission eigenvalues. The formula is applied to a quantum point contact (yielding conductance quantization at multiples of 4e2/h), to a quantum dot (yielding a non-Lorentzian conductance resonance), and to quantum interference effects in a disordered NS junction (enhanced weak-localization and reflectionless tunneling through a potential barrier).


©1992 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.46.12841
DOI: 10.1103/PhysRevB.46.12841
PACS: 74.50.+r, 72.10.Bg, 73.40.Gk

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