Ultrafast X-ray Absorption and Time-Resolved Resonant X-ray Scattering in a Mott Insulator

ORAL

Abstract

The time-evolution of collective excitations encodes information on photoinduced transient states in correlated systems. The frozen charge degrees of freedom in a Mott insulator can be activated by photodoping, which provides information about the interplay between various intertwined instabilities. Here, we simulate both ultrafast x-ray absorption and time-resolved resonant inelastic x-ray scattering (tr-RIXS) for a Hubbard model under the influence of a strong, transient drive. While absorption primarily provides information on transient photodoping, tr-RIXS allows us to study the evolution of bimagnon, Mott-gap, doublon, and single-particle in-gap excitations, as well as anti-Stokes relaxation following an ultrafast excitation of the system. This work provides a theoretical foundation for existing and future tr-RIXS experiments.

*This work was supported by the U.S. DOE, Office of Science (BES/MSED) under Contract No. DE-AC02-76SF00515 and used the computational resources of NERSC, a U.S. DOE, Office of Science User Facility operated under Contract No. DE-AC02-05CH11231. Yao Wang acknowledges the Postdoctoral Fellowship in Quantum Science (Harvard-MPQ, Center for Quantum Optics/AFOSR-MURI Quantum Phases of Matter) through Grant No. FA9550-14-1-0035.

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Presenters

  • Brian Moritz

    • SLAC National Accelerator Laboratory and Stanford University, SSRL Materials Science Division
    • SLAC National Accelerator Laboratory
    • SLAC
    • Stanford University
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA

Authors

  • Brian Moritz

    • SLAC National Accelerator Laboratory and Stanford University, SSRL Materials Science Division
    • SLAC National Accelerator Laboratory
    • SLAC
    • Stanford University
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA

  • Yao Wang

    • Harvard University
    • Department of Physics, Harvard University

  • Yuan Chen

    • Stanford University

  • Chunjing Jia

    • SLAC National Accelerator Laboratory
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • SLAC National Accelerator Lab.
    • SLAC - Natl Accelerator Lab
    • Stanford University

  • Thomas Devereaux

    • Stanford Univ
    • Materials Science and Engineering, Stanford University
    • Stanford University
    • SLAC National Accelerator Laboratory
    • Photon Sciences, Stanford Linear Accelerator (SLAC)
    • SIMES, SLAC
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
    • SLAC National Accelerator Lab.