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Nonequilibrium-DMFT based RIXS investigation of the two-orbital Hubbard model
EPL ( IF 1.8 ) Pub Date : 2021-04-12 , DOI: 10.1209/0295-5075/133/57005
Philipp Werner 1 , Steven Johnston 2 , Martin Eckstein 3
Affiliation  

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 is 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 $d{\text{-}}d$ excitation peaks on the nonequilibrium population of the Hubbard bands.



中文翻译:

基于非平衡 DMFT 的 RIXS 研究双轨道哈伯德模型

共振非弹性 X 射线散射 (RIXS) 可检测相关固体中各种类型的高能和低能基本激发,该工具将在研究光激发系统中的时间相关现象中发挥越来越重要的作用。虽然平衡 RIXS 谱计算的理论框架已经建立,但非平衡模拟的适当方法的开发是一个活跃的研究领域。在这里,我们应用最近开发的基于非平衡动态平均场理论 (DMFT) 的方法来计算光激发的双轨道莫特绝缘体的 RIXS 响应。结果证明了多轨道非平衡 RIXS 计算的可行性和准弹性荧光样特征和$d{\text{-}}d$ 哈伯德带的非平衡种群上的激发峰。

更新日期:2021-04-12
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