Study of mode-projected electron-phonon coupling in graphite by time -resolved ARPES

ORAL

Abstract

Time-resolved spectroscopies have significantly contributed to the study of the dynamical properties of conventional and quantum materials. By following the dynamics of excited electrons, one can follow the dominant scattering processes and discern the flow of energy from the electronic system to other degrees of freedom. Time and angle-resolved photoemission spectroscopy (TR-ARPES) allow one to access electron dynamics in a momentum resolved way. In this work, a balance of energy and time resolution revealed a peak associated with optical excitation. In addition, we observe quantized energy-loss scattering processes, which comes from the emission of an optical phonon from electrons in the direct-transition peak (DTP). The characteristic time scale associated with the transfer of spectral weight from the DTP to the phonon-scattering-peak can then be directly related to the mode-projected electron-phonon matrix element.

*This research is funded by the Max Planck-UBC-UTokyo Centre for Quantum Materials and the Canada First Research Excellence Fund, Gordon and Betty Moore Foundation's EPiQS Initiative, NSERC, Canada Foundation for Innovation, and the CIFAR Quantum Materials Program.

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Presenters

  • MengXing Na

    • University of British Colombia
    • Physics and Astronomy, University of British Columbia

Authors

  • MengXing Na

    • University of British Colombia
    • Physics and Astronomy, University of British Columbia

  • Arthur K Mills

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia

  • Fabio Boschini

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Matteo Michiardi

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Benjamin Nosarzewski

    • Stanford University
    • Physics, Stanford University

  • Ryan P Day

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Elia Razzoli

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Alexander Sheyerman

    • University of British Colombia
    • Physics and Astronomy, University of British Columbia

  • Giorgio Levy

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Michael Schneider

    • University of British Colombia
    • Physics and Astronomy, University of British Columbia

  • Sergey Zhdanovich

    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Thomas Devereaux

    • Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory
    • SLAC National Accelerator Laboratory
    • Physics, Stanford University
    • SLAC and Stanford University
    • Institute for Materials and Energy Science, Stanford
    • SIMES, SLAC National Accelerator Lab
    • SLAC National Accelerator Laboratory and Stanford University, Stanford Institute for Materials and Energy Sciences
    • SLAC, Stanford
    • SIMES, SLAC, and Stanford University
    • Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University

  • Alexander Kemper

    • North Carolina State University
    • Department of Physics, North Carolina State University
    • Physics, North Carolina State University

  • David J Jones

    • University of British Columbia
    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia

  • Andrea Damascelli

    • University of British Columbia
    • University of British Colombia
    • QMI, University of British Columbia
    • Physics and Astronomy, University of British Columbia
    • Stuart Blussom Quantum Matter Institute, University of British Columbia
    • Quantum Matter Institute, University of British Columbia
    • Department of Physics & Astronomy, University of British Columbia