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  • Letter
  • Open Access

Excitonic Tonks-Girardeau and charge density wave phases in monolayer semiconductors

Rafał Ołdziejewski1,2,*, Alessio Chiocchetta3, Johannes Knörzer1,2, and Richard Schmidt1,2

  • 1Max-Planck-Institute of Quantum Optics, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
  • 2Munich Center for Quantum Science and Technology (MCQST), Schellingstrasse 4, D-80799 München, Germany
  • 3Institute for Theoretical Physics, University of Cologne, Zülpicher Strasse 77, 50937 Cologne, Germany

  • *rafal.oldziejewski@mpq.mpg.de
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Phys. Rev. B 106, L081412 – Published 31 August, 2022

DOI: https://doi.org/10.1103/PhysRevB.106.L081412

Abstract

Excitons in two-dimensional semiconductors provide a novel platform for fundamental studies of many-body interactions. In particular, dipolar interactions between spatially indirect excitons may give rise to strongly correlated phases of matter that so far have been out of reach of experiments. Here we show that excitonic few-body systems in atomically thin transition-metal dichalcogenides confined to a one-dimensional geometry undergo a crossover from a Tonks-Girardeau to a charge density wave regime. To this end, we take into account realistic system parameters and predict the effective exciton-exciton interaction potential. We find that the pair-correlation function contains key signatures of the many-body crossover already at small exciton numbers and show that photoluminescence spectra provide readily accessible experimental fingerprints of these strongly correlated quantum many-body states.

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Phys. Rev. B 106, L081412– Published 31 August, 2022
  • Received 26 June 2021
  • Accepted 15 August 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.

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