Critical dynamics of superconducting Bi2Sr2CaCu2O8+delta films

Article

关键词: MAGNETIC PENETRATION DEPTH;    T-C;    2-DIMENSIONAL SUPERCONDUCTORS;    YBA2CU3O7-DELTA FILMS;    2-COIL APPARATUS;    SINGLE-CRYSTAL;    CONDUCTIVITY;    FLUCTUATIONS;    FIELD;    DEPENDENCE;   

DOI  :  10.1103/PhysRevB.68.144516

来源: SCIE

【 摘 要 】

We report on a systematic investigation of the critical fluctuations in the complex conductivity of epitaxially grown Bi2Sr2CaCu2O8+delta films for Tless than or similar toT(c) using a two-coil inductive technique at zero applied field. We observe the static three-dimensional (3D) XY critical exponent in the superfluid density near T-c. Linear scaling analysis close to the critical temperature yields a dynamic critical exponent of zapproximate to2.0 for small drive currents, but nonlinear effects are seen to be important. At T-c, a nonlinear scaling analysis also yields a 3D dynamic exponent of z=2.0+/-0.1.

【 授权许可】

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