Anomalous behaviour of S/N mesoscopic structures near Tc

S. Shapira, E. H. Linfield, C. J. Lambert, R. Seviour, A. F. Volkov, A. V. Zaitsev

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We observe a maximum in the conductance of Aluminum / n-GaAs junctions at temperatures 20 mK lower than the superconducting transition temperature. This is the first observation of a non- monotonic behavior of the conductance near the superconducting transition in superconducting normal 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 the critical temperature. This peak has the same origin as the subgap conductance observed in superconducting-normal junctions at low temperatures. Its calculated magnitude and position are in good agreement with our experimental observation.

LanguageEnglish
Pages159-162
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number1
DOIs
Publication statusPublished - 3 Jan 2000
Externally publishedYes

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critical temperature
Green's functions
transition temperature
aluminum
temperature dependence
temperature
energy

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Shapira, S., Linfield, E. H., Lambert, C. J., Seviour, R., Volkov, A. F., & Zaitsev, A. V. (2000). Anomalous behaviour of S/N mesoscopic structures near Tc. Physical Review Letters, 84(1), 159-162. https://doi.org/10.1103/PhysRevLett.84.159
Shapira, S. ; Linfield, E. H. ; Lambert, C. J. ; Seviour, R. ; Volkov, A. F. ; Zaitsev, A. V. / Anomalous behaviour of S/N mesoscopic structures near Tc. In: Physical Review Letters. 2000 ; Vol. 84, No. 1. pp. 159-162.
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Shapira, S, Linfield, EH, Lambert, CJ, Seviour, R, Volkov, AF & Zaitsev, AV 2000, 'Anomalous behaviour of S/N mesoscopic structures near Tc', Physical Review Letters, vol. 84, no. 1, pp. 159-162. https://doi.org/10.1103/PhysRevLett.84.159

Anomalous behaviour of S/N mesoscopic structures near Tc. / Shapira, S.; Linfield, E. H.; Lambert, C. J.; Seviour, R.; Volkov, A. F.; Zaitsev, A. V.

In: Physical Review Letters, Vol. 84, No. 1, 03.01.2000, p. 159-162.

Research output: Contribution to journalArticle

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Shapira S, Linfield EH, Lambert CJ, Seviour R, Volkov AF, Zaitsev AV. Anomalous behaviour of S/N mesoscopic structures near Tc. Physical Review Letters. 2000 Jan 3;84(1):159-162. https://doi.org/10.1103/PhysRevLett.84.159