Effect of the Orbital Level Difference in Doped Spin-1 Chains
Condensed Matter
2009-10-31 v2
Abstract
Doping of a two-orbital chain with mobile S=1/2 Fermions and strong Hund's rule couplings stabilizing the S=1 spins strongly depends on the presence of a level difference among these orbitals. By DMRG methods we find a finite spin gap upon doping and dominant pairing correlations without level-difference, whereas the presence of a level difference leads to dominant charge density wave (CDW) correlations with gapless spin-excitations. The string correlation function also shows qualitative differences between the two models.
Keywords
Cite
@article{arxiv.cond-mat/0002193,
title = {Effect of the Orbital Level Difference in Doped Spin-1 Chains},
author = {Beat Ammon and Masatoshi Imada},
journal= {arXiv preprint arXiv:cond-mat/0002193},
year = {2009}
}
Comments
4 pages, 4 figures