The electron-phonon interaction corresponding to the Holstein model (with Coulomb repulsion) is simulated in infinite dimensions using a novel quantum Monte Carlo algorithm. The thermodynamic phase diagram includes commensurate charge-density-wave phases, incommensurate charge-density-wave phases, and superconductivity. The crossover from a weak-coupling picture (where pairs both form and condense at Tc) to a strong-coupling picture (where preformed pairs condense at Tc) is illustrated with the onset of a double-well structure in the effective phonon potential.
@article{arxiv.cond-mat/9403048,
title = {Simulation of the electron-phonon interaction in infinite dimensions},
author = {J. K. Freericks and Mark Jarrell},
journal= {arXiv preprint arXiv:cond-mat/9403048},
year = {2007}
}
Comments
15 pages (three encapsulated postscript files appended at the end), latex