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VOLUME 24 (1976) | ISSUE 2 | PAGE 86
Influence of optical pumping on the tunnel characteristics of superconductors
It is shown that under the influence of optical pumping the peak in the phonon density of states of a superconductor at frequency V0 leads to a non-equilibrium increment of the tunnel current; this increment has a maximum at K= V0—2Δ and a minimum at V = V0 +2Δ. Qualitative agreement with experiment is obtained for the case of lead.