General Features of Quantum Creep in High- Tc Superconductors
A. F. Th. Hoekstra, R. Griessen, A. M. Testa, J. el Fattahi, M. Brinkmann, K. Westerholt, W. K. Kwok, G. W. Crabtree
DOI 10.1103/PhysRevLett.80.4293 · Physical Review Letters
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Abstract
Measurements of the relaxation rate QT of superconducting currents have been performed on a carefully selected set of dirty and clean high- Tc superconductors for temperatures T down to 100 mK and magnetic fields up to 7 T. The extrapolated relaxation rates Q0 for the dirty compounds indicate that the viscosity experienced by a tunneling vortex segment is grossly underestimated by the standard Bardeen-Stephen theory. For the clean compounds a universal value Q0≅0.022 is found at 1 T, implying that the number of superconducting charge carriers involved in the tunneling of a vortex segment is ≅14.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Pr1.85Ce0.15CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12.1 | Pressure not reported | unknown |
| Pr1.85Ce0.15CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23.2 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 67 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 77 | Pressure not reported | unknown |
| YBa2Cu3O6.55 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 66 | Pressure not reported | unknown |
| YBa2Cu3O6.6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 52 | Pressure not reported | unknown |
| YBa2Cu3O6.7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 57 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80 | Pressure not reported | unknown |
| Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 114 | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | unknown |
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