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Multi-probe conductance formulae for mesoscopic superconductors

Research output: Contribution to journalJournal article


Journal publication date21/06/1993
JournalJournal of Physics: Condensed Matter
Number of pages20
Original languageEnglish


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.