Strongly bound yet light bipolarons for double-well electron-phonon coupling
Strongly Correlated Electrons
2015-06-19 v1
Abstract
We use the Momentum Average approximation (MA) to study the ground-state properties of strongly bound bipolarons in the double-well electron-phonon (el-ph) coupling model, which describes certain intercalated lattices where the linear term in the el-ph coupling vanishes due tosymmetry. We show that this model predicts the existence of strongly bound yet lightweight bipolarons in some regions of the parameter space. This provides a novel mechanism for the appearance of such bipolarons, in addition to long-range el-ph coupling and special lattice geometries.
Cite
@article{arxiv.1406.3072,
title = {Strongly bound yet light bipolarons for double-well electron-phonon coupling},
author = {Clemens PJ Adolphs and Mona Berciu},
journal= {arXiv preprint arXiv:1406.3072},
year = {2015}
}
Comments
7 pages, 7 figures