Electron-phonon coupling and spin-charge separation in one-dimensional Mott insulators
Strongly Correlated Electrons
2009-11-11 v1
Abstract
We examine the single-particle excitation spectrum in the one-dimensional Hubbard-Holstein model at half-filling by performing the dynamical density matrix renormalization group (DDMRG) calculation. The DDMRG results are interpreted as superposition of spectra for a spinless carrier dressed with phonons. The superposition is a consequence of robustness of the spin-charge separation against electron-phonon coupling. The separation is in contrast to the coupling between phonon and spin degrees of freedom in two-dimensional systems. We discuss implication of the results of the recent angle-resolved photoemission spectroscopy measurements on SrCuO.
Cite
@article{arxiv.cond-mat/0511068,
title = {Electron-phonon coupling and spin-charge separation in one-dimensional Mott insulators},
author = {Hiroaki Matsueda and Takami Tohyama and Sadamichi Maekawa},
journal= {arXiv preprint arXiv:cond-mat/0511068},
year = {2009}
}
Comments
5 pages, 4 figures. submitted to the Physical Review Letters