Effect of short-ranged spatial correlations on the Anderson localization of phonons in mass-disordered systems
Effect of short-ranged spatial correlations on the Anderson localization of phonons in mass-disordered systems
复制标题
短程空间相关性对质量无序系统中声子安德森定位的影响
DOI：
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发表时间：
2020
影响因子：
1.8
通讯作者：
N. Vidhyadhiraja
中科院分区：
文献类型：
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作者：
W. Mondal;N. Vidhyadhiraja
我们采用基于绿色函数的方法，即典型的介质动力学集团近似，研究了质量无序系统中空间关联无序对三维声子安德森跃迁的影响.我们用数值方法证明了具有成对相关性的相关无序减轻了振动模式的局部化。随着关联强度的增加，三维无序系统中会出现关联驱动的定域-离域跃迁。
We investigate the effect of spatially correlated disorder on the Anderson transition of phonons in three dimensions using a Green’s function-based approach, namely, the typical medium dynamical cluster approximation, in mass-disordered systems. We numerically demonstrate that correlated disorder with pairwise correlations mitigates the localization of the vibrational modes. A correlation-driven localization–delocalization transition can emerge in a three-dimensional disordered system with an increase in the strength of correlations.