Vortex dynamics for two-dimensional XY models

Article

关键词: JOSEPHSON-JUNCTION ARRAYS;    MONTE-CARLO ANALYSIS;    LATTICE COULOMB GAS;    2-DIMENSIONAL SUPERFLUIDS;    FLUX NOISE;    SUPERCONDUCTING FILMS;    IV CHARACTERISTICS;    TRANSITION;    FLUCTUATIONS;    DISSIPATION;   

DOI  :  10.1103/PhysRevB.59.11506

来源: SCIE

【 摘 要 】

Two-dimensional XY models with resistively shunted junction (RSJ) dynamics and time dependent Ginzburg-Landau (TDGL) dynamics are simulated and it is verified that the vortex response is well described by the Minnhagen phenomenology for both types of dynamics. Evidence is presented supporting that the dynamical critical exponent z in the low-temperature phase is given by the scaling prediction (expressed in terms of the Coulomb gas temperature T-CG and the vortex renormalization given by the dielectric constant <(epsilon)over tilde>) z = 1/<(epsilon)over tilde>T-CG - 2 greater than or equal to 2 both for RSJ and TDGL and that the nonlinear IV exponent a is given by a = z + 1 in the low-temperature phase. The results are discussed and compared with the results of other recent papers and the importance of the boundary conditions is emphasized. [S0163-1829(99)05317-5].

【 授权许可】

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