DISTINGUISHING D-WAVE SUPERCONDUCTORS FROM HIGHLY ANISOTROPIC S-WAVE SUPERCONDUCTORS

Note

关键词: HEAVY-FERMION SUPERCONDUCTORS;    ZN-DOPED YBA2CU3O7;    PENETRATION DEPTH;    UNCONVENTIONAL SUPERCONDUCTORS;    TEMPERATURE-DEPENDENCE;    IMPURITY SCATTERING;    ORDER-PARAMETER;    GAP ANISOTROPY;    CU NMR;    STATE;   

DOI  :  10.1103/PhysRevB.49.15404

来源: SCIE

【 摘 要 】

Systematic impurity doping in the Cu-0 plane of the hole-doped cuprate superconductors may allow one to decide between unconventional (''d-wave'') and anisotropic conventional (''s-wave'') states as possible candidates for the order parameter in these materials. We show that potential scattering of any strength always increases the gap minima of such s-wave states, leading to activated behavior in temperature with characteristic impurity concentration dependence in observable quantities such as the penetration depth. A magnetic component to the scattering may destroy the energy gap and give rise to conventional gapless behavior, or lead to a nonmonotonic dependence of the gap on impurity concentration. We discuss how experiments constrain this analysis.

【 授权许可】

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