Vortex pinning and non-Hermitian quantum mechanics

Article

关键词: BOSON LOCALIZATION;    DISORDERED SYSTEMS;    FLUX;    ARRAYS;    TRANSITION;    DEFECTS;    FILMS;   

DOI  :  10.1103/PhysRevB.56.8651

来源: SCIE

【 摘 要 】

A delocalization phenomenon is studied in a class of non-Hermitian random quantum-mechanical problems. Delocalization arises in response to a sufficiently large constant imaginary vector potential. The transition is related to depinning of flux Lines from extended defects in type-II superconductors subject to a tilted external magnetic field. The physical meaning of the complex eigenvalues and currents of the non-Hermitian system is elucidated in terms of properties of tilted vortex lines. The singular behavior of the penetration length describing stretched exponential screening of a perpendicular magnetic field (transverse Meissner effect), the surface transverse magnetization, and the trapping length is determined near the flux-line depinning point.

【 授权许可】

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