Superconductivity in granular systems built from well-defined rhombohedral Bi-clusters: Evidence for Bi-surface superconductivity
B. Weitzel, H. Micklitz
DOI 10.1103/PhysRevLett.66.385 · Physical Review Letters
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Abstract
Granular systems built from well-defined Bi clusters with rhombohedral bulk structure show, in contrast to bulk Bi, the occurrence of superconductivity. The experimental facts of a strong size dependence of Tc and an influence of the surrounding matrix or adsorbed gas on normal-state resistivity ρ(0) and Tc can be satisfactorily explained by assuming the occurrence of surface superconductivity due to a strongly increased density of states N(εF) at the cluster surface.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | onset |
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