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.
@article{arxiv.1212.4841,
title = {Examining electron-boson coupling using time-resolved spectroscopy},
author = {Michael Sentef and Alexander F. Kemper and Brian Moritz and James K. Freericks and Zhi-Xun Shen and Thomas P. Devereaux},
journal= {arXiv preprint arXiv:1212.4841},
year = {2014}
}
Comments
23 pages, 4 figures + Supplementary Material and movies, to appear in PRX