Calculation of kappa(2)(T) for s-wave type-II superconductors

Article

关键词: UPPER CRITICAL-FIELD;    GINZBURG-LANDAU EQUATIONS;    FERMI-SURFACE HARMONICS;    TEMPERATURE-DEPENDENCE;    PURITY DEPENDENCE;    THERMODYNAMIC PROPERTIES;    MAGNETIC-PROPERTIES;    ANISOTROPY;    HC2;    LATTICES;   

DOI  :  10.1103/PhysRevB.68.184503

来源: SCIE

【 摘 要 】

This paper presents revised calculations for the Maki parameters kappa(1) and kappa(2) and the pair potential Delta(r) of s-wave type-II superconductors near the upper critical field H-c2 with arbitrary impurity concentration. It is found that Eilenberger's well-known results on kappa(2) [Phys. Rev. 153, 584 (1967)] are not correct quantitatively, which are modified appropriately. Calculations are also performed for a two-dimensional system with an isotropic Fermi surface. The results on clean systems differ substantially from those for the three-dimensional system with a spherical Fermi surface. This fact indicates the necessity of considering detailed Fermi-surface structures for a quantitative understanding of the parameters. The coefficient of Delta(r)proportional to(H-c2-B)(1/2), which is basic to any theoretical evaluation of the thermodynamic and transport properties near H-c2, is obtained accurately.

【 授权许可】

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