Spin-state transition and phase separation in multi-orbital Hubbard model
Strongly Correlated Electrons
2015-05-13 v1 Materials Science
Abstract
We study spin-state transition and phase separation involving this transition based on the milti-orbital Hubbard model. Multiple spin states are realized by changing the energy separation between the two orbitals and the on-site Hund coupling. By utilizing the variational Monte-Carlo simulation, we analyze the electronic and magnetic structures in hole doped and undoped states. Electronic phase separation occurs between the low-spin band insulating state and the high-spin ferromagnetic metallic one. Difference of the band widths in the two orbitals is of prime importance for the spin-state transition and the phase separation.
Cite
@article{arxiv.0905.1389,
title = {Spin-state transition and phase separation in multi-orbital Hubbard model},
author = {Ryo Suzuki and Tsutomu Watanabe and Sumio Ishihara},
journal= {arXiv preprint arXiv:0905.1389},
year = {2015}
}
Comments
5 pages, 5 figures