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arXiv · 1212.4841

Examining electron-boson coupling using time-resolved spectroscopy

Michael Sentef·Alexander F. Kemper·Brian Moritz·James K. Freericks·Zhi-Xun Shen·Thomas P. Devereaux
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Abstract

Nonequilibrium pump-probe time domain spectroscopies can become an important tool to disentangle degrees of freedom whose coupling leads to broad structures in the frequency domain. Here, using the time-resolved solution of a model photoexcited electron-phonon system we show that the relaxational dynamics are directly governed by the equilibrium self-energy so that the phonon frequency sets a window for "slow" versus "fast" recovery. The overall temporal structure of this relaxation spectroscopy allows for a reliable and quantitative extraction of the electron-phonon coupling strength without requiring an effective temperature model or making strong assumptions about the underlying bare electronic band dispersion.

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Michael Sentef, Alexander F. Kemper, Brian Moritz, James K. Freericks, Zhi-Xun Shen, Thomas P. Devereaux. 2012-12-19. Examining electron-boson coupling using time-resolved spectroscopy. https://doi.org/10.1103/physrevx.3.041033

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