In an attempt to clarify the nature of the crossover from a Peierls band insulator to a Mott Hubbard insulator, we analyze ground-state and spectral properties of the one-dimensional half-filled Holstein Hubbard model using exact diagonalization techniques.
@article{arxiv.cond-mat/0106116,
title = {Peierls-insulator Mott-insulator transition in 1D},
author = {H. Fehske and G. Wellein and A. Weiße and F. Göhmann and H. Büttner and A. R. Bishop},
journal= {arXiv preprint arXiv:cond-mat/0106116},
year = {2007}
}