Kibble-Zurek Mechanism for Dynamical Ordering in a Driven Vortex System
Kibble-Zurek Mechanism for Dynamical Ordering in a Driven Vortex System
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DOI：
10.1103/physrevlett.129.227001
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发表时间：
2022-11-23
影响因子：
8.6
通讯作者：
Okuma, S.
中科院分区：
文献类型：
--
作者：
Maegochi, S.;Ienaga, K.;Okuma, S.
Kibble-Zurek 机制描述了在有限淬火速率下跨越连续对称破缺相变的系统中拓扑缺陷的形成。虽然该机制已针对平衡转变进行了广泛研究，但其对非平衡转变的适用性尚未得到充分检验。最近的模拟表明，Kibble-Zurek 机制适用于粒子状组件中的动态有序转变，包括随机无序驱动的超导涡旋。在这里，我们通过实验研究了不同淬火速率下动态排序过程中涡旋的构型顺序。我们验证了缺陷密度与淬火速率的幂律缩放以及转变有序侧的脉冲绝热交叉，这是 Kibble-Zurek 机制的关键预测。我们的结果表明 Kibble-Zurek 机制对其他非平衡相变的适用性。
The Kibble-Zurek mechanism describes the formation of topological defects in systems crossing a continuous symmetry-breaking phase transition at a finite quench rate. While this mechanism has been extensively studied for equilibrium transitions, its applicability to nonequilibrium transitions has not yet been fully examined. Recent simulation has shown the applicability of the Kibble-Zurek mechanism to dynamical ordering transitions in particlelike assemblies, including superconducting vortices, driven over random disorder. Here, we experimentally study the configurational order of vortices in the course of dynamical ordering with various quench rates. We verify a power-law scaling of the defect density with the quench rate and an impulse-adiabatic crossover on the ordered side of the transition, which are key predictions of the Kibble-Zurek mechanism. Our results suggest the applicability of the Kibble-Zurek mechanism to other nonequilibrium phase transitions.