Phase competitions and coexistences in quasi-one-dimensional molecular conductors: exact diagonalization study
Strongly Correlated Electrons
2009-04-23 v1
Abstract
We investigate ground state properties of a quasi-one-dimensional electron-lattice coupled model for quarter-filled molecular conductors. The effective one-dimensional extended Hubbard model coupled to adiabatic lattice degree of freedom is derived by the inter-chain mean-field approximation and solved by Lanczos exact diagonalization method. We find that the critical behavior among lattice tetramerized states with different charge-lattice ordered patterns is sensitively affected by the inter-chain Coulomb interaction, lattice anharmonicity, and intrinsic dimerization. This indicates a subtle balance between these states originating from strong correlation and reduced dimensionality.
Cite
@article{arxiv.0904.3398,
title = {Phase competitions and coexistences in quasi-one-dimensional molecular conductors: exact diagonalization study},
author = {Yuichi Otsuka and Hitoshi Seo and Yukitoshi Motome and Takeo Kato},
journal= {arXiv preprint arXiv:0904.3398},
year = {2009}
}