Transition from reversible to irreversible flow: Absorbing and depinning transitions in a sheared-vortex system
Transition from reversible to irreversible flow: Absorbing and depinning transitions in a sheared-vortex system
复制标题
DOI：
10.1103/physrevb.83.012503
复制
发表时间：
2011-01-10
影响因子：
3.7
通讯作者：
Motohashi, A.
中科院分区：
文献类型：
--
作者：
Okuma, S.;Tsugawa, Y.;Motohashi, A.
我们提供的证据表明，一个可逆的不可逆的流动转变（RIT），在驱动的胶体粒子，发生在周期性剪切的涡旋下，在一个Corbino盘超导体的每个周期增加的位移d的涡旋。我们确定RIT的阈值位移d（c）作为流动噪声的开始。达到稳态的弛豫时间在d（c）附近发散，表明从自组织非波动（可逆）到波动扩散（不可逆）状态的吸收过渡。我们的研究结果强烈地表明，RIT是一个普遍的现象，在驱动相互作用粒子系统与淬火无序。我们还发现了脱钉过渡的临界行为类似的吸收过渡在同一涡系统的证据。
We provide evidence that a reversible to irreversible flow transition (RIT), as reported in driven colloidal particles, occurs in periodically sheared vortices in a Corbino-disk superconductor under increasing a displacement d of vortices per cycle. We determine a threshold displacement d(c) for RIT as the onset of flow noise. A relaxation time to reach the steady state diverges around d(c), indicative of an absorbing transition from self-organized nonfluctuating (reversible) to fluctuating diffusing (irreversible) states. Our results strongly suggest that RIT is a universal phenomenon in driven interacting particle systems with quenched disorder. We also find evidence for a depinning transition with critical behavior similar to that of the absorbing transition in the same vortex system.