Memory effect and phase transition in a hierarchical trap model for spin glasses
Memory effect and phase transition in a hierarchical trap model for spin glasses
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自旋玻璃分层陷阱模型中的记忆效应和相变
DOI：
10.1103/physreve.104.064105
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发表时间：
2021
影响因子：
2.4
通讯作者：
Chern, Gia-Wei
中科院分区：
文献类型：
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作者：
Zhang, Depei;Chen, Tianran;Vucelja, Marija;Lee, Seung-Hun;Chern, Gia-Wei
我们引入了一个有效的动力学树方法，使我们能够明确地证明在一个层次的能量景观的热释光磁化记忆效应。我们的模拟很好地再现了非平凡的等待时间和等待温度的依赖性，在这种非平衡现象。我们进一步研究了凝聚效应，其中一组小的微观态主导的多层陷阱模型的热力学行为。重要的是，多层树模型的结构相变与冷凝现象的发生相吻合。我们的研究结果强调了层次结构的重要性，并证明了玻璃化行为和结构的障碍树之间的密切关系。
We introduce an efficient dynamical tree method that enables us to explicitly demonstrate the thermoremanent magnetization memory effect in a hierarchical energy landscape. Our simulation nicely reproduces the nontrivial waiting-time and waiting-temperature dependences in this nonequilibrium phenomenon. We further investigate the condensation effect, in which a small set of microstates dominates the thermodynamic behavior in the multilayer trap model. Importantly, a structural phase transition of the multilayer tree model is shown to coincide with the onset of the condensation phenomenon. Our results underscore the importance of hierarchical structure and demonstrate the intimate relation between the glassy behavior and structure of barrier trees.