Concurrent intersection point of magnetization and magnetoconductivity curves in strongly fluctuating superconductors

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTORS;    II SUPERCONDUCTORS;    SCALING BEHAVIOR;    VORTEX-LATTICE;    FIELD;    TRANSITION;    YBA2CU3O7-DELTA;    BI2SR2CACU2O8;    CONDUCTIVITY;    HEAT;   

DOI  :  10.1103/PhysRevB.96.224509

来源: SCIE

【 摘 要 】

The thermal fluctuations contribution to magnetization and magnetoconductivity of type-II layered superconductors is calculated in the framework of the Lawrence-Doniach model. For numerous high-temperature cuprate superconductors, it was discovered that the magnetization dependence on temperature in a wide range of fields exhibits an intersection point at a temperature slightly below Tc. We notice a similar intersection point of the magnetoconductivity curves at the approximate same temperature. The phenomenon is explained by strong (non-Gaussian) thermal fluctuations with interactions treated using a self-consistent theory. All higher Landau levels should be included. Dimensionality of the fluctuations is defined, and the two- to three-dimensional crossover is the key for the existence of intersection points.

【 授权许可】

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