Critical fluctuations in high-Tc superconductors
C. J. Lobb
DOI 10.1103/PhysRevB.36.3930 · Physical Review B
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Abstract
The Ginzburg criterion suggests that the Ginzburg-Landau theory will break down within ∼0.1 K of the transition temperature of the new high-Tc superconductors. Theoretical consequences of this include a weak divergence in the specific heat at Tc, and a correlation length which diverges as (T−Tc)−ν with ν≅0.67. Conventional Ginzburg-Landau formulas for critical fields and penetration depths, and mean-field predictions for fluctuation-enhanced quantities, must also be modified close to Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O9-δ 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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