Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Anomalous behavior of superconducting-normal mesoscopic structures near T-c
AU - Shapira, S.
AU - Linfield, E. H.
AU - Lambert, C. J.
AU - Seviour, R.
AU - Volkov, A. F.
AU - Zaitsev, A. V.
PY - 2000
Y1 - 2000
N2 - 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.
AB - 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.
U2 - 10.1103/PhysRevLett.84.159
DO - 10.1103/PhysRevLett.84.159
M3 - Journal article
VL - 84
SP - 159
EP - 162
JO - Physical review letters
JF - Physical review letters
IS - 1
ER -