Ginzburg-Landau Expansion and the Slope of the Upper Critical Field in Disordered Superconductors with Anisotropic Pairing

Abstract

It is demonstrated that the slope of the upper critical field $|d{H}_{c2}/dT{|}_{T_c}$ in superconductors with $d$-wave pairing drops rather fast with concentration of normal impurities, while in superconductors with anisotropic $s$-wave pairing $|d{H}_{c2}/dT{|}_{T_c}$ grows, and in the limit of strong disorder is described by the known dependences of the theory of ``dirty'' superconductors. This allows to use the measurements of $H_{c2}$ in disordered superconductors to discriminate between these different types of pairing in high-temperature and heavy-fermion superconductors.

7 pages, 5 figures, RevTeX 3.0, 4 Postscript figures attached; Submitted to JETP Letters

References in corpus (3)

• Distinguishing d-wave from highly anisotropic s-wave superconductors
• Gap Renormalization in Dirty Anisotropic Superconductors: Implications for the Order Parameter of the Cuprates
• s-wave superconductivity from antiferromagnetic spin-fluctuation model for bilayer materials

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• Anomalous superconductivity and superfluidity in repulsive fermion systems
• Ginzburg-Landau Expansion and the Slope of the Upper Critical Field in Superconductors with Anisotropic Normal Impurity Scattering
• Effect of the long-range Coulomb interaction on phase diagram of the Kohn-Luttinger superconducting state in idealized graphene