%0 Journal Article
%T Effect of Electron-Phonon Interaction Range for a Half-Filled Band in One Dimension
%A Martin Hohenadler
%A Fakher F. Assaad
%A Holger Fehske
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevLett.109.116407
%X 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 Fr\"ohlich regime. The phase diagram contains metallic, Peierls, and phase-separated regions, which we characterize in terms of static and dynamical correlation functions. In particular, our results reveal a suppression of $2k_F$ charge correlations with increasing interaction range, allowing for a power-law decay comparable to the pairing correlations.
%U http://arxiv.org/abs/1205.0612v2