论文标题
T-Matrix近似的成功和分解，用于声子散射
Success and breakdown of the T-matrix approximation for phonon-disorder scattering
论文作者
论文摘要
我们通过实现一种展开的算法来研究广泛使用的T-Matrix近似值来治疗声子驱动散射的有效性，该算法允许模拟高达数千万原子的无序。对于低能量挠曲声子，T-Matrix近似在二维材料中发挥重要作用。此外，在描述最大质量无序系统时，洞察力发展为T-Matrix近似的成功。为此，将声子展开的形式主义被普遍描述质量障碍，并且光谱的强烈非扰动特征与玻尔兹曼准粒子图片有关。
We examine the validity of the widely used T-matrix approximation for treating phonon-disorder scattering by implementing an unfolding algorithm that allows simulation of disorder up to tens of millions of atoms. The T-matrix approximation breaks down for low-energy flexure phonons that play an important role in thermal transport in two-dimensional materials. Furthermore, insights are developed into the success of the T-matrix approximation in describing maximally mass disordered systems. To achieve this, the phonon unfolding formalism is generalized to describe mass disorder and strongly nonperturbative features of the spectrum are connected to the Boltzmann quasiparticle picture.
