Fermi-liquid theory for anisotropic superconductors

Article

关键词: D-WAVE SUPERCONDUCTORS;    PENETRATION-DEPTH ANISOTROPY;    QUASI-PARTICLES;    UNCONVENTIONAL SUPERCONDUCTORS;    TEMPERATURE-DEPENDENCE;    YBA2CU3O7;    HEAT;    STATE;    GAP;    BI2SR2CACU2O8+DELTA;   

DOI  :  10.1103/PhysRevB.64.134515

来源: SCIE

【 摘 要 】

This paper develops a Fermi-liquid theory for superconductors with anisotropic Fermi surfaces, Fermi-liquid interactions, and energy gaps. For d-wave superconductors, the Fermi-liquid interaction effects are found to be classifiable into strong and negligible renormalizaton effects, for symmetric and antisymmetric combinations of the energies of k up arrow and -k down arrow quasiparticles, respectively. Furthermore. the leading clean-limit temperature-dependent correction to the superfluid density in a d-wave superconductor is found to be renormalized by a Fermi velocity (or mass) renormalization effect. The question is raised of whether or not the penetration depth in the high-temperature superconductor YBa(2)Cu(3)O(6+x)alpha can be accounted for with physically acceptable parameters within the framework of a quasiparticle model. Fen-ni-liquid corrections to the spin susceptibility and to the zero-energy magnetic-field-induced density of states are also evaluated.

【 授权许可】

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