Residual absorption at zero temperature in d-wave superconductors

Article

关键词: OPTICAL CONDUCTIVITY;    CHARGE DYNAMICS;    SCATTERING;    BI2SR2CACU2O8+DELTA;    YBA2CU3O6.99;   

DOI  :  10.1103/PhysRevB.67.134509

来源: SCIE

【 摘 要 】

In a d-wave superconductor with elastic impurity scattering, not all the available optical spectral weight goes into the condensate at zero temperature, and this leads to residual absorption. We find that for a range of impurity parameters in the intermediate coupling regime between Born (weak) and unitary (strong) limit, significant oscillator strength remains which exhibits a cusplike behavior of the real part of the optical conductivity with upward curvature as a function of frequency, as well as a quasilinear temperature dependence of the superfluid density. The calculations offer an explanation of recent data on ortho-II YBa2Cu3O6.5 which has been considered anomalous.

【 授权许可】

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