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T∗anomaly in AgSn proximity-effect bridges under phonon injection

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
32
Issue
12
Identifiers
DOI: 10.1016/0038-1098(79)90887-1

Abstract

Abstract We have observed that steady state heater phonon pumping into AgSn proximity-effect bridges causes a systematic reduction of the bridge critical current. Below T λ, our results deviate anomalously from predictions of Parker's T ∗ model though both above and below T λ the injection-induced transition to the normal state appears continuous. Further, below T λ, bridges underlaid with a thin-film of germanium exhibit a discontinuous injection induced transition to the normal state. We discuss possible implications.

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