Dynamical response and competing orders in two-band Hubbard model
Strongly Correlated Electrons
2020-09-09 v1 Quantum Physics
Abstract
We present a dynamical mean-field study of two-particle dynamical response functions in two-band Hubbard model across several phase transitions. We observe that the transition between theexcitonic condensate and spin-state ordered state is continuous with a narrow strip of supersolidphase separating the two. Approaching transition from the excitonic condensate is announced bysoftening of the excitonic mode at theMpoint of the Brillouin zone. Inside the spin-state orderedphase there is a magnetically ordered state with 2x2 periodicity, which has no precursor in thenormal phase.
Cite
@article{arxiv.2006.09058,
title = {Dynamical response and competing orders in two-band Hubbard model},
author = {A. Niyazi and D. Geffroy and J. Kuneš},
journal= {arXiv preprint arXiv:2006.09058},
year = {2020}
}
Comments
8 pages, 9 figures