London penetration depth at zero temperature and near the superconducting transition

Autor(es)

Kogan, V. G. ^[1] ; Tanatar, M. A. ^{[2, 1]} ; Prozorov, R. ^{[2, 1]}

Afiliação do(s) autor(es)

^[1] Ames Lab DOE, Ames, IA 50011 - USA

^[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 - USA

• Tipo de documento: Artigo Científico
• Fonte: Physical Review B; v. 101, n. 10 MAR 19 2020.
• Citações Web of Science: 0

Resumo

A simple relation is established between the zero-T penetration depth lambda(0) and the slope of lambda(-2) (T) near T-c similar to Helfand-Werthamer's relation for H-c2(0) and the slope of H-c2(T) at T-c for the isotropic s-wave case with nonmagnetic scattering {[}E. Helfand and N. R. Werthamer, Phys. Rev. 147, 288 (1966)]. When the scattering parameter rho = (h) over barv/2 pi T(c)l (v is the Fermi velocity and l is the mean free path) varies from 1 to 10, the coefficient of proportionality between lambda(-2)(0) and T-c(d lambda(-2)/dT)(Tc) changes from 0.43 to 0.38. Combining this relation with the Rutgers thermodynamic identity, one can express lambda(0) in terms of the slope (dH(c2)/dT)(Tc) and the density of states. (AU)

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