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Creators/Authors contains: "Devereaux, T. P."

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  1. ; ; ; (, Physical Review Letters)
    Full Text Available 
  2. ; ; ; ; ; ; ; ; ; ; et al (, Science)
    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. Here, 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 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. 
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  3. ; ; ; ; ; ; ; ; ; ; et al (, Nature)
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