High-temperature transport and polaron speciation in the anharmonic Holstein model
Strongly Correlated Electrons
2021-10-22 v1 Disordered Systems and Neural Networks
Statistical Mechanics
Abstract
We study the finite-temperature transport of electrons coupled to anharmonic local phonons. Our focus is on the high-temperature incoherent regime, where controlled calculations are possible both for weak and strong electron--phonon coupling. At strong coupling, the dynamics is described in terms of a multiple-species gas of small polarons: this emergent `speciation' is driven by energy conservation. We explicitly compute the dc and ac response in this regime. We discuss the breakdown of the polaron picture, and the onset of localization, in the limit where phonons become quasistatic.
Keywords
Cite
@article{arxiv.2110.10170,
title = {High-temperature transport and polaron speciation in the anharmonic Holstein model},
author = {Attila Szabó and S. A. Parameswaran and Sarang Gopalakrishnan},
journal= {arXiv preprint arXiv:2110.10170},
year = {2021}
}
Comments
5+4 pages, 2 figures