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Title: Direct determination of mode-projected electron-phonon coupling in the time domain

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]; ORCiD logo [1]
  1. Univ. of British Columbia, Vancouver, BC (Canada); Quantum Matter Inst., Vancouver, BC (Canada)
  2. Univ. of British Columbia, Vancouver, BC (Canada); Quantum Matter Inst., Vancouver, BC (Canada); Max Planck Inst. for Chemical Physics of Solids, Dresden (Germany)
  3. Stanford Univ., CA (United States)
  4. North Carolina State Univ., Raleigh, NC (United States)

Ultrafast spectroscopies have become an important tool for elucidating the microscopic description and dynamical properties of quantum materials. In particular, by tracking the dynamics of nonthermal electrons, a material’s dominant scattering processes can be revealed. In this paper, we present a method for extracting the electron-phonon coupling strength in the time domain, using time- and angle-resolved photoemission spectroscopy (TR-ARPES). This method is demonstrated in graphite, where we investigate the dynamics of photoinjected electrons at the $$\overline{K}$$ point, detecting quantized energy-loss processes that correspond to the emission of strongly coupled optical phonons. We show that the observed characteristic time scale for spectral weight transfer mediated by phonon-scattering processes allows for the direct quantitative extraction of electron-phonon matrix elements for specific modes.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
Gordon and Betty Moore Foundation; National Science Foundation (NSF); Swiss National Science Foundation (SNSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1660443
Journal Information:
Science, Journal Name: Science Journal Issue: 6470 Vol. 366; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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Illuminating the dark corridor in graphene: polarization dependence of angle-resolved photoemission spectroscopy on graphene text January 2010
High-temperature behaviour of supported graphene: electron-phonon coupling and substrate-induced doping text January 2012
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Tracking Cooper Pairs in a Cuprate Superconductor by Ultrafast Angle-Resolved Photoemission text January 2012
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Collapse of superconductivity in cuprates via ultrafast quenching of phase coherence text January 2017
Advanced capabilities for materials modelling with Quantum ESPRESSO text January 2017
Real time evolution using the density matrix renormalization group text January 2004

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Computational framework chinook for angle-resolved photoemission spectroscopy journal November 2019
Time- and momentum-resolved phonon population dynamics with ultrafast electron diffuse scattering journal December 2019
Time- and momentum-resolved phonon population dynamics with ultrafast electron diffuse scattering text January 2019