Phase separation in the Hubbard model
强关联电子
2007-05-23 v2
摘要
Phase separation in the Hubbard model is investigated with the dynamical cluster approximation. We find that it is present in the paramagnetic solution for values of filling smaller than one and at finite temperature when a positive next-nearest neighbor hopping is considered. The phase separated region is characterized by a mixture of a strongly correlated metallic and Mott insulating phases. Our results indicate that phase separation is driven by the formation of doped regions with strong antiferromagnetic correlations and low kinetic energy
引用
@article{arxiv.cond-mat/0506148,
title = {Phase separation in the Hubbard model},
author = {A. Macridin and M. Jarrell and Th. Maier},
journal= {arXiv preprint arXiv:cond-mat/0506148},
year = {2007}
}
备注
accepted for publication in PRB