Numerical study of the strongly screened vortex-glass model in an external field

Article

关键词: MONTE-CARLO;    PHASE-TRANSITIONS;    JOSEPHSON ARRAYS;    SPIN-GLASS;    SUPERCONDUCTORS;    ORDER;   

DOI  :  10.1103/PhysRevB.60.6304

来源: SCIE

【 摘 要 】

The vortex-glass model for a disordered high-T-c superconductor in an external magnetic field is studied in the strong screening limit. With exact ground state (i.e., T = 0) calculations we show that (1) the ground state of the vortex configuration varies drastically with infinitesimal variations of the strength of the external field; (2) the minimum energy of global excitation loops of length scale L do not depend on the strength of the external field; however, (3) the excitation loops themself depend sensibly on the field. From (2) we infer the absence of a true superconducting state at any finite-temperature independent of the external field. [S0163-1829(99)08133-3].

【 授权许可】

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