论文标题
观察泵探针光谱中石墨烯纳米容器的光诱导的手性边缘状态
Observing photo-induced chiral edge states of graphene nanoribbons in pump-probe spectroscopies
论文作者
论文摘要
由于拓扑特性和分散性的可调性，光诱导的边缘状态在低维材料中引起了很大的关注。具体而言，已经预计用圆极化光照射时将石墨烯纳米杆菌构成手性边缘模式。在这里，我们介绍了时间分辨角度分辨光发射光谱（Trarpes）和石墨烯纳米替伯苯的时间分辨谐振非弹性X射线散射（TRRIX）的数值计算。我们表征了光诱导的边缘状态的泵探针光谱特征，说明了由浮光拓扑边缘模式产生的不同光谱特征的起源，并研究了传入的光子能量和RIX中有限的核心孔寿命的作用。借助动量，能量和时间分辨率，泵探针光谱可以在理解光诱导的物质拓扑状态的行为中发挥重要作用。
Photo-induced edge states in low dimensional materials have attracted considerable attention due to the tunability of topological properties and dispersion. Specifically, graphene nanoribbons have been predicted to host chiral edge modes upon irradiation with circularly polarized light. Here, we present numerical calculations of time-resolved angle resolved photoemission spectroscopy (trARPES) and time-resolved resonant inelastic x-ray scattering (trRIXS) of a graphene nanoribbon. We characterize pump-probe spectroscopic signatures of photo-induced edge states, illustrate the origin of distinct spectral features that arise from Floquet topological edge modes, and investigate the roles of incoming photon energies and finite core-hole lifetime in RIXS. With momentum, energy, and time resolution, pump-probe spectroscopies can play an important role in understanding the behavior of photo-induced topological states of matter.
