4.6 Article

Critical behavior of plastic depinning of vortex lattices in two dimensions: Molecular dynamics simulations

期刊

PHYSICAL REVIEW B
卷 82, 期 13, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.134519

关键词

-

向作者/读者索取更多资源

Using molecular dynamics simulations, we report a study of the dynamics of two-dimensional vortex lattices driven over a disordered medium. In strong disorder, when topological order is lost, we show that the depinning transition is analogous to a second-order critical transition: the velocity-force response at the onset of motion is continuous and characterized by critical exponents. Combining studies at zero and nonzero temperature and using a scaling analysis, two critical exponents are evaluated. We find v similar to (F-F-c)(beta) with beta = 1.3 +/- 0.1 at T = 0 and F > F-c, and v similar to T-1/delta with delta(-1) = 0.75 +/- 0.1 at F = F-c, where F-c is the critical driving force at which the lattice goes from a pinned state to a sliding one. Both critical exponents and the scaling function are found to exhibit universality with regard to the pinning strength and different disorder realizations. Furthermore, the dynamics is shown to be chaotic in the whole critical region.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据