Critical dynamics of superconducting Bi2Sr2CaCu2O8+δ films
K. D. Osborn, D. J. Van Harlingen, Vivek Aji, Nigel Goldenfeld, S. Oh, J. N. Eckstein
DOI 10.1103/PhysRevB.68.144516 · Physical Review B
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Abstract
We report on a systematic investigation of the critical fluctuations in the complex conductivity of epitaxially grown Bi2Sr2CaCu2O8+δ films for T≲Tc using a two-coil inductive technique at zero applied field. We observe the static three-dimensional (3D) XY critical exponent in the superfluid density near Tc. Linear scaling analysis close to the critical temperature yields a dynamic critical exponent of z≈2.0 for small drive currents, but nonlinear effects are seen to be important. At Tc, a nonlinear scaling analysis also yields a 3D dynamic exponent of z=2.0±0.1.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79.1 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84.9 | Pressure not reported | onset |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 84.7 | Pressure not reported | onset |
| YBa2Cu3O7-x 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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