基于石墨烯的电子Lévy玻璃中的参数化玻璃态
Parametric Glassiness in Graphene-based Electronic Lévy Glass
AI总结：
该研究在模拟光学现象的石墨烯基电子Lévy玻璃中观测到类复制对称性破缺的重叠现象与参数化介观玻璃态，通过调谐费米能实现重叠分布的折返式变化，证实该效应具有普适性并揭示其与相干输运特性的关联。
摘要：
复杂无序导体即便不存在热力学稳定的玻璃相，也可呈现高度结构化且对参数敏感的输运行为。最初为复制对称性破缺（RSB）开发的重叠分布，是表征该结构的有效诊断工具，前提是需将其解释与平衡态帕里西构造区分开来。本研究中，我们在基于石墨烯的电子Lévy玻璃（一种通过电子过程模拟光学现象的器件）中观测到类RSB的重叠现象学及参数化介观玻璃态。通过调谐费米能，我们可控制传播波模的数量，并观测到从窄中心型到宽型或双峰型重叠分布的折返式变化。该现象学在基于石墨烯的及传统二维电子气电子Lévy玻璃中均被观测到，表明其具有普适性。样本分辨的重叠分布显示，该效应是每个无序势场的固有属性；而归一化电导方差则表明，绝对方差的增长主要由平均电导的增加所致。因此，我们将重叠解释为分层组织输运路径间相关性的度量，而折返行为则是相干输运中钉扎、参数诱导重组及介观混沌的证据。
英文摘要：
Complex disordered conductors can display highly structured and parameter-sensitive transport even in the absence of a thermodynamically stable glass phase. Overlap distributions originally developed for replica symmetry breaking (RSB) provide a useful diagnostic of this organization, provided that their interpretation is distinguished from the equilibrium Parisi construction. In this study, we report RSB-like overlap phenomenology and parametric mesoscopic glassiness in a graphene-based electronic Lévy glass, a device that mimics optical phenomena via electronic processes. By tuning the Fermi energy, we can control the number of propagating wave modes and observe reentrant changes from narrowly centered to broad or bimodal overlap distributions. The phenomenology is observed in both graphene-based and conventional two-dimensional electron-gas electronic Lévy glasses, indicating its generality. Sample-resolved overlap distributions show that the effect is intrinsic to each disorder landscape, whereas the normalized conductance variance shows that the growth of the absolute variance is mainly caused by the increasing mean conductance. We therefore interpret the overlap as a measure of correlation among hierarchically organized transport pathways and the reentrant behavior as evidence of pinning, parameter-induced reorganizations, and mesoscopic chaos in coherent transport.
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