Dynamic critical behaviors of three-dimensional XY models related to superconductors/superfluids

Details Dynamic critical behaviors of three-dimensional XY models related to superconductors/superfluids Dynamic critical behaviors of three-dimensional XY models related to superconductors/superfluids

1999-12-17

arxiv.org/abs/cond-mat/9912325v1

Europhys. Lett. 49, 644 (2000)

Physics

Condensed Matter

Superconductivity

7 pages, 5 figures with europhys.sty, to appear in Europhys. Lett

Scientific paper

10.1209/epl/i2000-00199-0

The dynamic critical exponent z is determined from numerical simulations for the three-dimensional XY model subject to two types of dynamics, i.e. relaxational dynamics and resistively shunted junction (RSJ) dynamics, as well as for two different treatments of the boundary, i.e., periodic boundary condition (PBC) and fluctuating twist boundary condition (FTBC). In case of relaxational dynamics, finite size scaling at the critical temperature gives $z\approx 2$ for PBC and 1.5 for FTBC, while for RSJ dynamics $z\approx 1.5$ is obtained in both cases. The results are discussed in the context of superfluid/superconductors and vortex dynamics, and are compared with what have been found for other related models.

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