Collective Dynamics and Strong Pinning near the Onset of Charge Order in La1.48Nd0.4Sr0.12CuO4
Collective Dynamics and Strong Pinning near the Onset of Charge Order in La1.48Nd0.4Sr0.12CuO4
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La1.48Nd0.4Sr0.12CuO4 中电荷序开始附近的集体动力学和强钉扎
DOI：
10.1103/physrevlett.120.156602
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发表时间：
2018
影响因子：
8.6
通讯作者：
Popović, Dragana
中科院分区：
文献类型：
--
作者：
Baity, P. G.;Sasagawa, T.;Popović, Dragana
电荷有序态的动力学是欠掺杂铜氧化物高温超导体的关键问题之一，但在几乎所有的铜氧化物中都检测到了静态的短程电荷有序畴。我们通过测量非平衡电荷传输或电阻来探测CO（和结构）转变的动力学，因为系统响应温度变化和外加磁场。我们发现亚稳态，集体行为和临界性的证据。在临界区的集体动力学表明强烈的钉扎无序。令人惊讶的是，非平衡效应，如雪崩，揭示只有当临界区域接近电荷有序相。我们的研究结果提供了长期寻求的证据，波动秩序整个CO过渡，也设置了重要的约束理论的动态条纹。
The dynamics of charge-ordered states is one of the key issues in underdoped cuprate high-temperature superconductors, but static short-range charge-order (CO) domains have been detected in almost all cuprates. We probe the dynamics across the CO (and structural) transition inby measuring nonequilibrium charge transport, or resistanceas the system responds to a change in temperature and to an applied magnetic field. We find evidence for metastable states, collective behavior, and criticality. The collective dynamics in the critical regime indicates strong pinning by disorder. Surprisingly, nonequilibrium effects, such as avalanches in, are revealed only when the critical region is approached from the charge-ordered phase. Our results onprovide the long-sought evidence for the fluctuating order across the CO transition, and also set important constraints on theories of dynamic stripes.