A Theory for Pump-Probe Resonant Inelastic X-ray scattering

POSTER

Abstract

Nonequilibrium approaches are widely used as powerful techniques in condensed matter physics to characterize the evolution of excitations. In recent years, resonant inelastic X-ray scattering (RIXS) has become an important tool to investigate specific collective excitations in correlated materials with momentum and energy resolution. Combined with the progress in ultrafast instrumentation, time-resolved RIXS (tr-RIXS) holds the promise to detect nonequilibrium dynamics of numerous collective modes, which play significant roles in emergent phenomena. Here we present a theoretical and numerical study of tr-RIXS. Through the evaluation of tr-RIXS for a few important physical models, we show that tr-RIXS has the capability to elucidate the dynamics of the particle-hole excitations. As a function of pump intensity, frequency, and time, tr-RIXS exhibits Floquet band replicas and renormalization even at this multi-particle level. The evolution of other collective excitations coupled to charge degrees of freedom can be revealed in the spectra, with distinct modulation and relaxation due to the core-hole potential in the intermediate state.

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Presenters

  • Yuan Chen

    Department of Applied Physics, Stanford University, Stanford University

Authors

  • Yuan Chen

    Department of Applied Physics, Stanford University, Stanford University

  • Yao Wang

    Department of Applied Physics, Stanford University, Harvard Univ, Physics, Harvard University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory

  • Chunjing Jia

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC National Accelerator Laboratory, SIMIS, Stanford University, SLAC - Natl Accelerator Lab, Stanford University, Stanford Univ

  • Brian Moritz

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, SLAC and Stanford University, SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, SIMIS, Stanford University, Physics, Stanford University, Stanford Univ, SIMES, SLAC and Stanford University

  • Thomas Devereaux

    Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Stanford Univ, SLAC and Stanford University, SLAC National Accelerator Laboratory, SLAC - Natl Accelerator Lab, Stanford Institute for Materials and Energy Sciences, SLAC National Laboratory, Stanford University, SIMIS, Stanford University, Physics, Stanford University, SLAC National Lab and Stanford University, SIMES, SLAC and Stanford University