Dynamic transitions and resonances in Josephson-junction arrays under oscillating magnetic fields
凝聚态物理
2009-11-07 v1
摘要
We investigate dynamic transitions and stochastic resonance phenomena in two-dimensional fully frustrated Josephson-junction arrays driven by staggered oscillating magnetic fields. As the temperature is lowered, the dynamic order parameter, defined to be the average staggered magnetization, is observed to acquire nonzero values. The resulting transition is found to belong to the same universality as the equilibrium Z_2 transition for small driving amplitudes while large driving fields appear to induce deviation from the universality class. The transition is also manifested by the stochastic resonance peak of the signal-to-noise ratio, which develops above the transition temperature.
引用
@article{arxiv.cond-mat/0204598,
title = {Dynamic transitions and resonances in Josephson-junction arrays under oscillating magnetic fields},
author = {Gun Sang Jeon and Hyun Jin Kim and M. Y. Choi and Beom Jun Kim and Petter Minnhagen},
journal= {arXiv preprint arXiv:cond-mat/0204598},
year = {2009}
}
备注
6 pages, final form