ELASTIC CHAIN IN A RANDOM POTENTIAL - SIMULATION OF THE DISPLACEMENT CORRELATION-FUNCTION AND RELAXATION

Article

关键词: II SUPERCONDUCTORS;    VARIATIONAL THEORY;    VORTEX LATTICES;    RANDOM-MEDIA;    FLUX CREEP;    IMPURITIES;    ORDER;   

DOI  :  10.1103/PhysRevB.52.12939

来源: SCIE

【 摘 要 】

We simulate the low-temperature behavior of an elastic chain in a random potential where the displacements u(x) are confined to the longitudinal direction [u(x) parallel to x] as in a one-dimensional charge-density wave-type problem. We calculate the displacement correlation function g(x)=[[u(x)- u(O)](2)]. We find that g(x)similar to x(2 eta) with eta = 3/4 at short distances and eta = 3/5 at intermediate distances. The exponent eta = 3/5 is in agreement with the random manifold exponent obtained from replica calculations. The distribution of nearest distances between pinning wells and chain particles is found to develop forbidden regions.

【 授权许可】

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