相互作用对电子 Floquet 谱的影响：激子效应
Interaction effects on electronic Floquet spectra: Excitonic effects
AI总结：
本文提出对泵浦场与电子-电子相互作用双重微扰展开的方法，解析揭示虚激发激子也会显著修正半导体单电子 Floquet 谱，并在磷烯与单层 MoS$_2$ 中计算相关实验效应。
摘要：
利用光对电子态进行 Floquet 工程是现代实验中的核心课题。然而，在这种非平衡情形下，多体相互作用对单电子性质的影响仍不清楚。我们提出，在计算物理量时，通过对泵浦场和电子-电子相互作用同时进行微扰展开，可以合理理解相互作用效应。作为示例，我们将该方法应用于半导体，并通过解析方式表明，即使激子仅被泵浦光虚激发，激子效应（即电子-空穴相互作用效应）也会对单电子 Floquet 谱产生显著修正。我们在磷烯和单层 MoS$_2$ 中，针对时间和角分辨光电子能谱以及超快光学实验计算了这些效应。
英文摘要：
Floquet engineering of electronic states by light is a central topic in modern experiments. However, the impact of many-body interactions on the single-electron properties remains unclear in this non-equilibrium situation. We propose that interaction effects could be reasonably understood by performing perturbative expansion in both the pump field and the electron-electron interaction when computing physical quantities. As an example, we apply this approach to semiconductors and show analytically that excitonic effects, i.e., effects of electron-hole interaction, lead to dramatic corrections to the single-electron Floquet spectra even when the excitons are only virtually excited by the pump light. We compute these effects in phosphorene and monolayer MoS$_2$ for time- and angle-resolved photoemission spectroscopy and ultrafast optical experiments.
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。
