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arXiv 1802.09017cond-mat.dis-nn
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可变形晶格中的无无序弱动力学局域化

Disorder-free weak dynamic localization in deformable lattices

A. V. Savin, Y. S. Kivshar, M. I. Molina

摘要:

本文研究了在半经典近似下的形变晶格中的电子输运问题。形变晶格是一个离散的非线性弹性链,其中声子在温度T下处于热平衡。我们发现,由于热化声子在系统中诱导的有效动力学无序不足以产生安德森局域化。然而,对于弱非线性,我们观察到的弹道(低T)和扩散(高T)制度之间的过渡,而对于强非线性的过渡发生在本地化孤子(低T)和扩散(高T)制度之间。因此,电子-声子相互作用的结果在弱的温度依赖的动态局域化。

英文摘要:

We study the electron transport in a deformable lattice modeled in the semiclassical approximation as a discrete nonlinear elastic chain where acoustic phonons are in thermal equilibrium at temperature T. We reveal that an effective dynamic disorder induced in the system due to thermalized phonons is not strong enough to produce Anderson localization. However, for weak nonlinearity we observe a transition between ballistic (low T) and diffusive (high T) regimes, while for strong nonlinearity the transition occurs between the localized soliton (low T) and diffusive (high T) regimes. Thus, the electron-phonon interaction results in weak temperature-dependent dynamic localization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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