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Crossover from mesoscopic to classical proximity effects, induced by particle-hole symmetry breaking in Andreev interferometers

Volkov, A and Allsopp, N and Lambert, Colin (1996) Crossover from mesoscopic to classical proximity effects, induced by particle-hole symmetry breaking in Andreev interferometers. Journal of Physics: Condensed Matter, 8 (4). L45-L50. ISSN 0953-8984

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Abstract

When two superconducting contacts are made on either side of a mesoscopic normal wire, the electrical conductance is a periodic function of the phase difference between the superconductors. For this structure, the oscillation at zero voltage and zero temperature is a small mesoscopic effect, with an amplitude of order e(2)/h. In contrast, we predict that a finite bias voltage V will induce giant oscillations associated with the classical proximity effect. These are a finite fraction of the overall conductance, exhibit a maximum when eV equals the Thouless energy, and decrease at higher voltages. This effect may account for the large-amplitude oscillations measured in recent experiments by Petrashov et al.

Item Type: Article
Journal or Publication Title: Journal of Physics: Condensed Matter
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 58150
Deposited By: ep_importer_pure
Deposited On: 24 Oct 2012 16:53
Refereed?: Yes
Published?: Published
Last Modified: 17 Sep 2013 08:40
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58150

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