Effects of superconducting gap anisotropy on the flux flow resistivity in Y(Ni1-xPtx)(2)B2C

Article

关键词: DENSITY-OF-STATES;    D-WAVE SUPERCONDUCTORS;    PENETRATION DEPTH;    VORTEX;    YNI2B2C;    RENORMALIZATION;    SURFACE;    NODES;    LINES;    CORE;   

DOI  :  10.1103/PhysRevB.66.184511

来源: SCIE

【 摘 要 】

The microwave complex surface impedance Z(s) of Y(Ni1-xPtx)(2)B2C was measured at 0.5 K under magnetic fields H up to 7 T. In nominally pure YNi2B2C, which is a strongly anisotropic s-wave superconductor, the flux flow resistivity rho(f) calculated from Z(s) was twice as large as that expected from the conventional normal-state vortex core model. In Pt-doped samples where the gap anisotropy is smeared out, the enhancement of rho(f) is reduced and rho(f) approaches the conventional behavior. These results indicate that the energy dissipation in the vortex core is strongly affected by the anisotropy of the superconducting gap.

【 授权许可】

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