Phys. Rev. B 36, 3930–3932 (1987)Critical fluctuations in high-Tc superconductorsReceived 28 May 1987; published in the issue dated 1 September 1987 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. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.36.3930
DOI:
10.1103/PhysRevB.36.3930
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