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Title: Charge order in the kagome lattice Holstein model: a hybrid Monte Carlo study

Abstract

The Holstein model is a paradigmatic description of the electron-phonon interaction, in which electrons couple to local dispersionless phonon modes, independent of momentum. The model has been shown to host a variety of ordered ground states such as charge density wave (CDW) order and superconductivity on several geometries, including the square, honeycomb, and Lieb lattices. In this work, we study CDW formation in the Holstein model on the kagome lattice, using a recently developed hybrid Monte Carlo simulation method. We present evidence for √3 × √3 CDW order at an average electron filling of < n > = 2/3 per site, with an ordering wavevector at the K-points of the Brillouin zone. We estimate a phase transition occurring at Tc ≈ t/18, where t is the nearest-neighbor hopping parameter. Our simulations find no signature of CDW order at other electron fillings or ordering momenta for temperatures T ≥ t/20.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [1]
  1. Univ. of California, Davis, CA (United States)
  2. Univ. of California, Davis, CA (United States); Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1972733
Grant/Contract Number:  
SC0022311
Resource Type:
Accepted Manuscript
Journal Name:
npj Quantum Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 2397-4648
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Electronic properties and materials; Phase transitions and critical phenomena; Theory and computation

Citation Formats

Bradley, Owen, Cohen-Stead, Benjamin, Johnston, Steven, Barros, Kipton, and Scalettar, Richard T. Charge order in the kagome lattice Holstein model: a hybrid Monte Carlo study. United States: N. p., 2023. Web. doi:10.1038/s41535-023-00553-y.
Bradley, Owen, Cohen-Stead, Benjamin, Johnston, Steven, Barros, Kipton, & Scalettar, Richard T. Charge order in the kagome lattice Holstein model: a hybrid Monte Carlo study. United States. https://doi.org/10.1038/s41535-023-00553-y
Bradley, Owen, Cohen-Stead, Benjamin, Johnston, Steven, Barros, Kipton, and Scalettar, Richard T. Sat . "Charge order in the kagome lattice Holstein model: a hybrid Monte Carlo study". United States. https://doi.org/10.1038/s41535-023-00553-y. https://www.osti.gov/servlets/purl/1972733.
@article{osti_1972733,
title = {Charge order in the kagome lattice Holstein model: a hybrid Monte Carlo study},
author = {Bradley, Owen and Cohen-Stead, Benjamin and Johnston, Steven and Barros, Kipton and Scalettar, Richard T.},
abstractNote = {The Holstein model is a paradigmatic description of the electron-phonon interaction, in which electrons couple to local dispersionless phonon modes, independent of momentum. The model has been shown to host a variety of ordered ground states such as charge density wave (CDW) order and superconductivity on several geometries, including the square, honeycomb, and Lieb lattices. In this work, we study CDW formation in the Holstein model on the kagome lattice, using a recently developed hybrid Monte Carlo simulation method. We present evidence for √3 × √3 CDW order at an average electron filling of < n > = 2/3 per site, with an ordering wavevector at the K-points of the Brillouin zone. We estimate a phase transition occurring at Tc ≈ t/18, where t is the nearest-neighbor hopping parameter. Our simulations find no signature of CDW order at other electron fillings or ordering momenta for temperatures T ≥ t/20.},
doi = {10.1038/s41535-023-00553-y},
journal = {npj Quantum Materials},
number = 1,
volume = 8,
place = {United States},
year = {Sat May 06 00:00:00 EDT 2023},
month = {Sat May 06 00:00:00 EDT 2023}
}

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