论文标题
基于DMFT的非平衡型RIX对两轨哈伯德模型的研究
Nonequilibrium-DMFT based RIXS investigation of the two-orbital Hubbard model
论文作者
论文摘要
共振非弹性X射线散射（RIX）在相关固体中检测到各种类型的高能量基本激发，该工具将在照片中依赖性现象的研究中起越来越重要的作用。尽管已经确定了用于计算平衡rix光谱的理论框架，但开发适当的非平衡模拟方法是一个主动研究领域。在这里，我们采用了最近开发的基于非平衡动力场理论（DMFT）的方法来计算光启用的两轨莫特绝缘子的RIX响应。结果表明，多轨非平衡RIX计算以及准弹性荧光样特征的敏感性和Hubbard频段非平衡种群的D-D激发峰。
Resonant inelastic X-ray scattering (RIXS) detects various types of high- and low-energy elementary excitations in correlated solids, and this tool will play an increasingly important role in investigations of time-dependent phenomena in photo-excited systems. While theoretical frameworks for the computation of equilibrium RIXS spectra are well established, the development of appropriate methods for nonequilibrium simulations are an active research field. Here, we apply a recently developed nonequilibrium dynamical mean field theory (DMFT) based approach to compute the RIXS response of photo-excited two-orbital Mott insulators. The results demonstrate the feasibility of multi-orbital nonequilibrium RIXS calculations and the sensitivity of the quasi-elastic fluorescence-like features and d-d excitation peaks on the nonequilibrium population of the Hubbard bands.
