Dynamical phases of driven vortices interacting with periodic pinning

Article

关键词: FLUX-LINE-LATTICE;    VORTEX LATTICES;    SUPERCONDUCTING FILMS;    PLASTIC-FLOW;    ARRAYS;    DEFECTS;    DISORDER;    2H-NBSE2;    SITES;   

DOI  :  10.1103/PhysRevB.62.R14661

来源: SCIE

【 摘 要 】

The finite temperature dynamical phases of vortices in films driven by a uniform force and interacting with the periodic pinning potential of a square lattice of columnar defects are investigated by Langevin dynamics simulations of a London model. Vortices driven along the [0,1] direction and at densities for which there are more vortices than columnar defects (B>B-phi) are considered. At low temperatures, two dynamical phases, elastic flow and plastic flow, and a sharp transition between them are identified and characterized according to the behavior of the vortex spatial order, velocity distribution, and frequency-dependent velocity correlations.

【 授权许可】

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