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Multi-probe conductance formulae for mesoscopic superconductors

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<mark>Journal publication date</mark>21/06/1993
<mark>Journal</mark>Journal of Physics: Condensed Matter
Issue number25
Volume5
Number of pages20
Pages (from-to)4187-4206
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

After presenting an intuitive picture of quasi-particle transport in mesoscopic superconductors, which emphasizes the intimate relation between Andreev scattering and zero resistivity, we develop a general theory of DC transport in mesoscopic normal-superconducting structures. Generalized multi-probe conductance formulae are derived, which take into account not only the effect of Andreev scattering on transport coefficients. but also the non-conservation of quasi-particle charge which arises in the presence of a superconducting condensate. Experiments on quasi-particle charge imbalance are described naturally by this approach.