Density of states in layered short-coherence-length superconducting structures
Branko P. Stojković, Oriol T. Valls
DOI 10.1103/PhysRevB.50.3374 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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