Two-dimensional plasmonic polarons in n-doped monolayer MoS2

Fabio Caruso, Patrick Amsalem, Jie Ma, Areej Aljarb, Thorsten Schultz, Marios Zacharias, Vincent Tung, Norbert Koch, and Claudia Draxl
Phys. Rev. B 103, 205152 – Published 27 May 2021

Abstract

We report experimental and theoretical evidence of strong electron-plasmon interaction in n-doped single-layer MoS2. Angle-resolved photoemission spectroscopy 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 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 two dimensions.

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  • Received 6 July 2020
  • Revised 16 May 2021
  • Accepted 17 May 2021

DOI:https://doi.org/10.1103/PhysRevB.103.205152

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Fabio Caruso1,2, Patrick Amsalem2, Jie Ma2, Areej Aljarb3, Thorsten Schultz2,4, Marios Zacharias5, Vincent Tung3, Norbert Koch2,4, and Claudia Draxl2

  • 1Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany
  • 2Institut für Physik and IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin, Germany
  • 3Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
  • 4Helmholtz-Zentrum für Materialien und Energie GmbH, Berlin, Germany
  • 5Department of Mechanical and Materials Science Engineering, Cyprus University of Technology, P.O. Box 50329, 3603 Limassol, Cyprus

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Issue

Vol. 103, Iss. 20 — 15 May 2021

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