Correlation Effect on Peierls Transition
Abstract
The effect of correlation on Peierls transition, which is accompanied by a dimerization, t_d, of a bond alternation for transfer energy, has been examined for a half-filled one-dimensional electron system with on-site repulsive interaction (U). By applying the renormalization group method to the interaction of the bosonized Hamiltonian, the dimerization has been calculated variationally and self-consistently with a fixed electron-phonon coupling constant (\lambda) and it is shown that t_d takes a maximum as a function of U. The result is examined in terms of charge gap and spin gap and is compared with that of the numerical simulation by Hirsch [Phys. Rev. Lett 51 (1983) 296]. Relevance to the spin Peierls transition in organic conductors is discussed.
Cite
@article{arxiv.cond-mat/0201570,
title = {Correlation Effect on Peierls Transition},
author = {Muneo Sugiura and Yoshikazu Suzumura},
journal= {arXiv preprint arXiv:cond-mat/0201570},
year = {2009}
}
Comments
4 pages, 4 figures, to be published in J. Phys. Soc. Jpn. 71 No.3 (2002)