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Energy gap reduction in superconducting tin films by quasiparticle injection

Journal Article · · Phys. Rev. Lett.; (United States)

In Sn-I-Sn-I-Pb tunneling structures the energy gap deltaD/sub Sn/ of Sn is reduced by quasiparticle injection via single-particle tunneling the Sn films. ..delta../sub Sn/ as function of the quasiparticle density is probed by th Pb contact and found in agreement with the theory of Owen and Scalapino. An instability of the energy gap of Sn is observed at the critical gap reduction ratio predicted by this theory for a first-order phase transition.

Research Organization:
Physikalisches Institut der Universitaet Stuttgart, D 7000 Stuttgart 80, Germany
OSTI ID:
7223272
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 38:16; ISSN PRLTA
Country of Publication:
United States
Language:
English