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Anomalous behavior of superconducting-normal mesoscopic structures near T(c) | | S Shapira
; E H Linfield
; C J Lambert
; R Seviour
; A F Volkov
; A V Zaitsev
; | | Date: |
3 Jan 2000 | | Journal: | Phys Rev Lett, 84 (1), 159-62 | | 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. | | Source: | PubMed, pmid11015859 | | Services: | Forum | Review | Favorites | |
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