Phase diagram of the triangular extended Hubbard model
Abstract
We study the extended Hubbard model on the triangular lattice as a function of filling and interaction strength. The complex interplay of kinetic frustration and strong interactions on the triangular lattice leads to exotic phases where long-range charge order, antiferromagnetic order, and metallic conductivity can coexist. Variational Monte Carlo simulations show that three kinds of ordered metallic states are stable as a function of nearest neighbor interaction and filling. The coexistence of conductivity and order is explained by a separation into two functional classes of particles: part of them contributes to the stable order, while the other part forms a partially filled band on the remaining substructure. The relation to charge ordering in charge transfer salts is discussed.
Cite
@article{arxiv.1402.3160,
title = {Phase diagram of the triangular extended Hubbard model},
author = {Luca F. Tocchio and Claudius Gros and Xue-Feng Zhang and Sebastian Eggert},
journal= {arXiv preprint arXiv:1402.3160},
year = {2014}
}
Comments
5 pages, 5 figures. For more information and the latest version see: http://www.physik.uni-kl.de/eggert/papers/index.html