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arXiv 1909.08477cond-mat.supr-concond-mat.stat-mech
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驱动涡旋物质的交流动力学重组与非平衡相变

Ac dynamic reorganization and non-equilibrium phase transition in driven vortex matter

Mariano Marziali Bermúdez, Leticia F. Cugliandolo, Gabriela Pasquini

摘要:

外部驱动的玻璃体系可能经历非平衡相变(NEPT)。特别是,交流驱动的系统显示特殊功能,如观察到的旋涡物质的$\mathrm{NbSe_2}$,振荡驱动器重组成部分有序的涡旋晶格系统。我们提供了实验证据,这种动态重组,我们显示了一个明确的签名,其连接与一个NEPT驱动的交流力量。我们进行缩放分析,我们估计临界指数为这个过渡。我们的结果与一些玻璃-粘性液体NEPT有相似之处,并邀请在其他弹性无序介质中寻找类似的物理。

英文摘要:

Externally driven glassy systems may undergo non-equilibrium phase transitions (NEPTs). In particular, ac-driven systems display special features, like those observed in the vortex matter of $\mathrm{NbSe_2}$, where oscillatory drives reorganize the system into partially ordered vortex lattices. We provide experimental evidence for this dynamic reorganization and we show an unambiguous signature of its connection with an NEPT driven by ac forces. We perform a scaling analysis and we estimate critical exponents for this transition. Our results share similarities with some glass-to-viscous-liquid NEPTs and invite to search for similar physics in other elastic disordered media.

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