Fluctuation paraconductivity in mesoscopic superconductor–normal-metal contacts
A. F. Volkov, K. E. Nagaev, R. Seviour
DOI 10.1103/PhysRevB.57.5450 · Physical Review B
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Abstract
The fluctuation conduction of normal-metal–superconductor–normal-metal (N/S/N) and superconductor–normal-metal–superconductor (S/N/S) contacts above Tc are analyzed. For N/S/N contacts, both Aslamazov-Larkin and Maki-Thompson corrections to the conduction are found to be of the same order and diverge for Tc*<Tc according to the law (T−Tc*)−1. For S/N/S contacts, the Aslamazov-Larkin correction vanishes, while the Maki-Thompson correction is essential for contacts shorter than the phase breaking length.
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