Effect of electron-phonon interaction range for a half-filled band in one dimension.

@article{Hohenadler2012EffectOE,
  title={Effect of electron-phonon interaction range for a half-filled band in one dimension.},
  author={Martin Hohenadler and Fakher F. Assaad and Holger Fehske},
  journal={Physical review letters},
  year={2012},
  volume={109 11},
  pages={
          116407
        }
}
We demonstrate that fermion-boson models with nonlocal interactions can be simulated at finite band filling with the continuous-time quantum Monte Carlo method. We apply this method to explore the influence of the electron-phonon interaction range for a half-filled band in one dimension, covering the full range from the Holstein to the Fröhlich regime. The phase diagram contains metallic, Peierls, and phase-separated regions. Nonlocal interactions suppress the Peierls instability, and thereby… 

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