Ginzburg-Landau expansion in non-Fermi-liquid superconductors: Effect of the mass renormalization factor

I. Ţifrea; J. A. Budagosky Marcilla; J. J. Rodríguez-Núñez

doi:10.1103/PhysRevB.66.104507

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Ginzburg-Landau expansion in non-Fermi-liquid superconductors: Effect of the mass renormalization factor

I. Ţifrea, J. A. Budagosky Marcilla, J. J. Rodríguez-Núñez

DOI 10.1103/PhysRevB.66.104507 · Physical Review B

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Abstract

We reconsider the Ginzburg-Landau expansion for the case of a non-Fermi-liquid superconductor. We obtain analytical results for the Ginzburg-Landau functional in the critical region around the superconducting phase transition T<~Tc in two special limits of the model, i.e., the spin-charge separation case and the anomalous Fermi liquid case. For both cases, in the presence of a mass renormalization factor, we derived the form and the specific dependence of the coherence length, penetration depth, specific heat jump at the critical point, and the magnetic upper critical field. For both limits the obtained results reduce to the usual BCS results for a two dimensional s-wave superconductor. We compare our results with recent and relevant theoretical work. The results for a d-wave symmetry order parameter do not qualitatively change the results presented in this paper. Only numerical factors appear additionally in our expressions.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown