We report experimental and theoretical evidence of strong electron-plasmon interaction in n-doped single-layer MoS2. Angle-resolved photoemission spectroscopy (ARPES) measurements reveal the emergence of distinctive signatures of polaronic coupling in the electron spectral function. Calculations based on many-body perturbation theory illustrate that electronic coupling to two-dimensional (2D) carrier plasmons provides an exhaustive explanation of the experimental spectral features and their energies. These results constitute compelling evidence of the formation of plasmon-induced polaronic quasiparticles, suggesting that highly-doped transition-metal dichalcogenides may provide a new platform to explore strong-coupling phenomena between electrons and plasmons in 2D.
@article{arxiv.2104.14242,
title = {Two-dimensional plasmonic polarons in n-doped monolayer MoS2},
author = {Fabio Caruso and Patrick Amsalem and Jie Ma and Areej Aljarb and Thorsten Schultz and Marios Zacharias and Vincent Tung and Norbert Koch and Claudia Draxl},
journal= {arXiv preprint arXiv:2104.14242},
year = {2021}
}