Macroscopic anisotropy in superconductors with anisotropic gaps

Article

关键词: MGB2;    HEAT;   

DOI  :  10.1103/PhysRevB.66.020509

来源: SCIE

【 摘 要 】

It is shown within the weak-coupling model that the macroscopic superconducting anisotropy for materials with a gap varying on the Fermi surface cannot be characterized by a single number, unlike the case of clean materials with isotropic gaps. For clean uniaxial materials, the anisotropy parameter gamma(T) defined as the ratio of London penetration depths, lambda(c)/lambda(ab), is evaluated for all T's. Within the two-gap model of MgB2, gamma(T) is an increasing function of T.

【 授权许可】

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