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VOLUME 53 (1991) | ISSUE 10 | PAGE 503
Anomalous thermodynamic characteristics of an S/N superlattice
The density of states has been found for superconducting and normal monoatomic layers of asuperlattice. The energy corresponding to the maximum of the density of states, Δ, may be considerably higher than the standard value according to the BCS theory, 1.76 Tc. This circumstance might explain the large value of the ratio 2A/TC ~5-6 for highTc superconductors.