Negative 4-Probe Conductances of Mesoscopic Superconducting Wires

Details Negative 4-Probe Conductances of Mesoscopic Superconducting Wires Negative 4-Probe Conductances of Mesoscopic Superconducting Wires

1994-03-02

arxiv.org/abs/cond-mat/9403008v1

Physics

Condensed Matter

Latex, 3 figures available on request to pya055@cent1.lancs.ac.uk (Simon Robinson)

Scientific paper

10.1103/PhysRevB.50.9611

We analyze the longitudinal 4-probe conductance of mesoscopic normal and superconducting wires and predict that in the superconducting case, large negative values can arise for both the weakly disordered and localized regimes. This contrasts sharply with the behaviour of the longitudinal 4-probe conductance of normal wires, which in the localized limit is always exponentially small and positive.

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