Depinning and creep motion in glass states of flux lines
Depinning and creep motion in glass states of flux lines
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DOI：
10.1103/physrevlett.98.267002
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发表时间：
2007-06-29
影响因子：
8.6
通讯作者：
Hu, Xiao
中科院分区：
文献类型：
--
作者：
Luo, Meng-Bo;Hu, Xiao
利用计算机动力学模拟方法，研究了玻璃态涡旋物质。一个真正的连续脱钉过渡观察到在零温度下，这也支配低温蠕变运动。与缩放的概念，我们评估在高精度的临界指数和标度函数，我们观察到一个非Arcidius蠕变运动弱集体钉扎布拉格玻璃稳定在平衡，而强钉扎，著名的Arcidius法恢复。在这两种情况下，在低温下，在脱钉和蠕变之间发生急剧的交叉。
Using dynamical computer simulation, we investigate vortex matter in glass states. A genuine continuous depinning transition is observed at zero temperature, which also governs the low-temperature creep motion. With the notion of scaling, we evaluate in high accuracy critical exponents and scaling functions; we observe a non-Arrhenius creep motion for weak collective pinning where the Bragg glass is stabilized at equilibrium, while for strong pinning, the well-known Arrhenius law is recovered. In both cases, a sharp crossover takes place between depinning and creep at low temperatures.