Disorder-induced topological defects in a d=2 elastic medium at zero temperature

Article

关键词: CHARGE-DENSITY WAVES;    II SUPERCONDUCTORS;    XY MODEL;    STATE;    TRANSITION;    DIMENSIONS;    ROUGHNESS;    SUBSTRATE;    ALGORITHM;    SYMMETRY;   

DOI  :  10.1103/PhysRevB.61.14787

来源: SCIE

【 摘 要 】

The density and correlations of topological defects are investigated numerically in a model of a d=2 elastic medium subject to a periodic quenched random potential. The computed density of defects decreases approximately exponentially with the defect core energy. Comparing the defect-free ground state with the ground state with defects, it is found that the difference is described by stringlike excitations, bounded by defect pairs, which have a fractal dimension of 1.250+/-0.003. At zero temperature, the disorder-induced defects screen the interaction of introduced vortex pairs.

【 授权许可】

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