Sign reversal of the mixed-state Hall resistivity in type-II superconductors

Article

关键词: T-C SUPERCONDUCTORS;    HIGH-TEMPERATURE SUPERCONDUCTORS;    FLUX-FLOW REGIME;    SCALING BEHAVIOR;    YBA2CU3OY/PRBA2CU3OY SUPERLATTICES;    COLUMNAR DEFECTS;    THIN-FILMS;    LATTICE;    YBA2CU3O7-DELTA;    BI2SR2CACU2OX;   

DOI  :  10.1103/PhysRevB.60.3080

来源: SCIE

【 摘 要 】

Taking into account pinning, thermal fluctuations, and vortex-vortex interactions, we develop a unified theory to explain the sign reversal of the mixed-state Hall resistivity rho(xy) in both high-T-c and low-T-c superconductors. Molecular dynamics simulations show that besides the pinning forces, either the thermal fluctuations in the high-T-c superconductors or the vortex-vortex interactions in the low-T-c ones play an important role in the sign reversal of rho(xy). From a calculated phase diagram for vortex motion, we find that the abnormal Hall effect always occurs in the plastic flow state of vortices. [S0163-1829(99)11629-1].

【 授权许可】

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