Floquet theory for the electronic stopping of projectiles in solids
Floquet theory for the electronic stopping of projectiles in solids
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DOI：
10.1103/physrevresearch.2.033151
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发表时间：
2019-03
影响因子：
4.2
通讯作者：
Nicolo' Forcellini;E. Artacho
中科院分区：
文献类型：
--
作者：
Nicolo' Forcellini;E. Artacho
提出了一个研究晶体中粒子射弹电子阻止的一般理论框架。它既不依赖于微扰或线性响应近似，也不依赖于理想的金属宿主。相反，它利用了时空对角线上的离散平移对称性，时空对角线是由一个沿沿着具有晶体周期性的轨迹匀速运动的抛射体决定的。这使得表征（频闪）固定的解决方案，通过Floquet理论的时间周期系统。以前的微扰和非线性jeldom模型恢复从这个一般的理论。基于Floquet准能量守恒原理，分析了绝缘子中的临界速度效应。
A general theoretical framework for the study of electronic stopping of particle projectiles in crystalline solids is proposed. It neither relies on perturbative or linear response approximations, nor on an ideal metal host. Instead, it exploits the discrete translational symmetries in a space-time diagonal determined by a projectile with constant velocity moving along a trajectory with crystalline periodicity. This allows for the characterisation of (stroboscopically) stationary solutions, by means of Floquet theory for time-periodic systems. Previous perturbative and non-linear jellium models are recovered from this general theory. An analysis of the threshold velocity effect in insulators is presented based on Floquet quasi-energy conservation.