Surface Polaron Formation in the Holstein model
Strongly Correlated Electrons
2015-05-13 v1
Abstract
The effect of a solid-vacuum interface on the properties of a strongly coupled electron-phonon system is analyzed using dynamical mean-field theory to solve the Holstein model in a semi-infinite cubic lattice. Polaron formation is found to occur more easily (i.e., for a weaker electron-phonon coupling) on the surface than in the bulk. On the other hand, the metal-insulator transition associated to the binding of polarons takes place at a unique critical strength in the bulk and at the surface.
Cite
@article{arxiv.0905.1379,
title = {Surface Polaron Formation in the Holstein model},
author = {Reza Nourafkan and Massimo Capone and Nasser Nafari},
journal= {arXiv preprint arXiv:0905.1379},
year = {2015}
}
Comments
5 pages, 3 figures