The anharmonic electron-phonon problem
Condensed Matter
2009-10-28 v1
Abstract
The anharmonic electron-phonon problem is solved in the infinite-dimensional limit using quantum Monte Carlo simulation. Charge-density-wave order is seen to remain at half filling even though the anharmonicity removes the particle-hole symmetry (and hence the nesting instability) of the model. Superconductivity is strongly favored away from half filling (relative to the charge-density-wave order) but the anharmonicity does not enhance transition temperatures over the maximal values found in the harmonic limit.
Keywords
Cite
@article{arxiv.cond-mat/9605109,
title = {The anharmonic electron-phonon problem},
author = {J. K. Freericks and Mark Jarrell and G. D. Mahan},
journal= {arXiv preprint arXiv:cond-mat/9605109},
year = {2009}
}
Comments
5 pages typeset in ReVTeX. Four encapsulated postscript files included