TY - JOUR
T1 - Inhomogeneous superconducting transitions in granular Al
AU - Muller, K. A.
AU - Pomerantz, M.
AU - Knoedler, C. M.
AU - Abraham, D.
PY - 1980
Y1 - 1980
N2 - Granular A1 films have been measured in a microwave cavity at 9.4 GHz together with their dc resistance, R(T). The change in resonant frequency is proportional to the number of superconducting electron pairs which is finite above the temperature Tcρ, where R(T)0. Microwave loss has been identified which appears to be specific to granular materials and vanishes only well below Tcρ. This is shown to be due to normal conduction between grains, which upon cooling becomes progressively more Josephson-like.
AB - Granular A1 films have been measured in a microwave cavity at 9.4 GHz together with their dc resistance, R(T). The change in resonant frequency is proportional to the number of superconducting electron pairs which is finite above the temperature Tcρ, where R(T)0. Microwave loss has been identified which appears to be specific to granular materials and vanishes only well below Tcρ. This is shown to be due to normal conduction between grains, which upon cooling becomes progressively more Josephson-like.
UR - http://www.scopus.com/inward/record.url?scp=11644257012&partnerID=8YFLogxK
U2 - 10.1103/physrevlett.45.832
DO - 10.1103/physrevlett.45.832
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AN - SCOPUS:11644257012
SN - 0031-9007
VL - 45
SP - 832
EP - 835
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
ER -