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.

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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