4.8 Article

Charge Order in the Holstein Model on a Honeycomb Lattice

期刊

PHYSICAL REVIEW LETTERS
卷 122, 期 7, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.077602

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资金

  1. Department of Energy [DE-SC0014671]
  2. French government through UCAJEDI Investments in the Future project [ANR-15-IDEX-01]
  3. CAPES
  4. CNPq
  5. U.S. Department of Energy (DOE) [DE-SC0014671] Funding Source: U.S. Department of Energy (DOE)

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The effect of electron-electron interactions on Dirac fermions, and the possibility of an intervening spin-liquid phase between the semimetal and antiferromagnetic (AF) regimes, has been a focus of intense quantum simulation effort over the last five years. We use determinant quantum Monte Carlo simulations to study the Holstein model on a honeycomb lattice and explore the role of electron-phonon interactions on Dirac fermions. We show that they give rise to charge-density-wave (CDW) order and present evidence that this occurs only above a finite critical interaction strength. We evaluate the temperature for the transition into the CDW which, unlike the AF transition, can occur at finite values owing to the discrete nature of the broken symmetry.

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