1.
Phys Rev Lett
; 84(1): 159-62, 2000 Jan 03.
Article
in English
| MEDLINE
| ID: mdl-11015859
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.
2.
Phys Rev B Condens Matter
; 53(14): 9267-9276, 1996 Apr 01.
Article
in English
| MEDLINE
| ID: mdl-9982428