Employing the Lanczos algorithm in combination with a kernel polynomial moment expansion (KPM) and the maximum entropy method (MEM), we show a way of calculating charge and spin excitations in the Holstein t-J model, including the full quantum nature of phonons. To analyze polaron band formation we evaluate the hole spectral function for a wide range of electron-phonon coupling strengths. For the first time, we present results for the optical conductivity of the 2D Holstein t-J model.
@article{arxiv.cond-mat/9612202,
title = {Spectral properties of the 2D Holstein t-J model},
author = {H. Fehske and G. Wellein and B. Bäuml and R. N. Silver},
journal= {arXiv preprint arXiv:cond-mat/9612202},
year = {2009}
}
Comments
2 pages, Latex. Submitted to Physica C, Proc. Int. Conf. on M2HTSC V