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Effect of Electron-Phonon Interaction Range for a Half-Filled Band in One Dimension | | Martin Hohenadler
; Fakher F. Assaad
; Holger Fehske
; | | Date: |
3 May 2012 | | Abstract: | 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. | | Source: | arXiv, 1205.0612 | | Services: | Forum | Review | PDF | Favorites | |
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