Time- and angular- resolved photoelectron spectroscopy is a powerful technique to measure electron dynamics in solids. Recent advances in this technique have facilitated band and energy resolved observations of the effect that excited phonons, have on the electronic structure. Here, we show with the help of ab initio simulations that the Fourier analysis of the time-resolved measurements of solids with excited phonon modes enables the determination of the band- and mode-resolved electron-phonon coupling directly from the experimental data without any additional input from theory. Such an observation is not restricted to regions of strong electron-phonon coupling and does not require strongly excited or hot phonons, but can be employed to monitor the dynamical renormalization of phonons in driven phases of matter.

中文翻译：

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用时间分辨ARPES直接测量电子声子耦合

时间分辨和角度分辨光电子能谱是一种测量固体中电子动力学的强大技术。该技术的最新进展促进了带和能量分辨的观察，该观察表明了激发声子对电子结构的影响。在这里，我们借助ab initio进行展示模拟表明，对具有激发声子模式的固体的时间分辨测量值进行傅立叶分析，可以直接从实验数据确定能带和模式分辨的电子声子耦合，而无需理论上的任何额外输入。这样的观察不限于强电子-声子耦合的区域，并且不需要强激发或热声子，而是可以用于监测物质驱动相中声子的动态重正态化。