Electrical transport and superconductivity in a Au-YBa2Cu3O7 percolation system
Gang Xiao, F. H. Streitz, M. Z. Cieplak, A. Bakhshai, A. Gavrin, C. L. Chien
DOI 10.1103/PhysRevB.38.776 · Physical Review B
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Abstract
Percolation behaviors of normal-state conductivity and superconductivity have been studied in a Au-YBa2Cu3O7 granular system. The normal-state conductivity shows a percolation threshold at a Au volume fraction pAu of 23%, whereas the superconducting network shows a threshold at pAu∼60%. The presence of Au has negligible effect on the superconducting YBa2Cu3O7 phase. In the dilute limit, the ratio of the Meissner signal to the diamagnetic-shielding signal approaches unity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure unresolved | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure unresolved | onset |
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