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Shapira S, Linfield EH, Lambert CJ, et al. Anomalous behavior of superconducting-normal mesoscopic structures near T(c). Phys Rev Lett. 2000;84(1):159-62doi: 10.1103/PhysRevLett.84.159.
Shapira, S., Linfield, E. H., Lambert, C. J., Seviour, R., Volkov, A. F., & Zaitsev, A. V. (2000). Anomalous behavior of superconducting-normal mesoscopic structures near T(c). Physical review letters, 84(1), 159-62. https://doi.org/10.1103/PhysRevLett.84.159
Shapira, et al. "Anomalous behavior of superconducting-normal mesoscopic structures near T(c)." Physical review letters vol. 84,1 (2000): 159-62. doi: https://doi.org/10.1103/PhysRevLett.84.159
Shapira S, Linfield EH, Lambert CJ, Seviour R, Volkov AF, Zaitsev AV. Anomalous behavior of superconducting-normal mesoscopic structures near T(c). Phys Rev Lett. 2000 Jan 03;84(1):159-62. doi: 10.1103/PhysRevLett.84.159. PMID: 11015859.
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Phys Rev Lett. 2000 Jan 03;84(1):159-62. doi: 10.1103/PhysRevLett.84.159.

Anomalous behavior of superconducting-normal mesoscopic structures near T(c).

Physical review letters

Shapira, Linfield, Lambert, Seviour, Volkov, Zaitsev

Affiliations

  1. Cavendish Laboratory, University of Cambridge, Madingley Road CB3 0HE, United Kingdom.

PMID: 11015859 DOI: 10.1103/PhysRevLett.84.159

Abstract

We observe a maximum in the conductance of Al/n-GaAs junctions at temperatures 20 mK lower than the superconducting transition temperature (T(c)). This is the first observation of a peak in the conductance near the superconducting transition in superconducting-normal (S/N) junctions. To accommodate this effect we calculate the full temperature dependence of the conductance of these structures, invoking quasiclassical Green's functions in the diffusive limit. In addition to the well-known low-temperature peak at temperatures on the order of the Thouless energy, we find a maximum near T(c). This peak has the same origin as the subgap conductance observed in S/N junctions at low temperatures.

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