Effective one-band electron-phonon Hamiltonian for nickel perovskites
Condensed Matter
2016-08-31 v1
Abstract
Inspired by recent experiments on the Sr-doped nickelates, , we propose a minimal microscopic model capable to describe the variety of the observed quasi-static charge/lattice modulations and the resulting magnetic and electronic-transport anomalies. Analyzing the motion of low-spin (s=1/2) holes in a high-spin (S=1) background as well as their their coupling to the in-plane oxygen phonon modes, we construct a sort of generalized Holstein t-J Hamiltonian for the planes, which contains besides the rather complex ``composite-hole'' hopping part non-local spin-spin and hole-phonon interaction terms.
Keywords
Cite
@article{arxiv.cond-mat/9702051,
title = {Effective one-band electron-phonon Hamiltonian for nickel perovskites},
author = {J. Loos and H. Fehske},
journal= {arXiv preprint arXiv:cond-mat/9702051},
year = {2016}
}
Comments
12 pages, LaTeX, submitted to Phys. Rev. B