Phase competitions and coexistences in quasi-one-dimensional molecular conductors: Exact diagonalization study

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 sol...

Full description

Saved in:
Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2009-03, Vol.404 (3-4), p.479-481
Main Authors: Otsuka, Yuichi, Seo, Hitoshi, Motome, Yukitoshi, Kato, Takeo
Format: Article
Language:English
Subjects:
Charge order
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact diagonalization
Exact sciences and technology
Lattice dimerization
Lattice tetramerization
Molecular conductors
Physics
Spin-Peierls state
Theories and models of many electron systems
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2008.11.060