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DOE OSTI · 1098094

Examining Electron-Boson Coupling Using Time-Resolved Spectroscopy

Sentef, Michael·Kemper, Alexander F.·Moritz, Brian·Freericks, James K.·Shen, Zhi-Xun·Devereaux, Thomas P.
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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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Sentef, Michael, Kemper, Alexander F., Moritz, Brian, Freericks, James K., Shen, Zhi-Xun, Devereaux, Thomas P.. 2013-12-26. Examining Electron-Boson Coupling Using Time-Resolved Spectroscopy. https://doi.org/10.1103/physrevx.3.041033

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