Abstract
We have performed a theoretical study of superconductor-normal-metal layered structures using a microscopic method. Results are given for the single-particle density of states, the order parameter, and the energy gap as a function of the coherence length, temperature, pair-breaking impurity mean-free path, and depth or probe range. The results are found to be in good agreement with those obtained from tunneling experiments on a Au-NbSe2 bilayer and on the high-temperature superconductor Nd2-xCexCuO4-y. The spatial variation of all quantities has been taken into account self-consistently. The roles of all relevant lengths and their experimental implications are discussed and emphasis is put on the case of short-coherence-length materials.
Original language | English (US) |
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Pages (from-to) | 3374-3383 |
Number of pages | 10 |
Journal | Physical Review B |
Volume | 50 |
Issue number | 5 |
DOIs | |
State | Published - 1994 |