Dynamical response and competing orders in two-band Hubbard model

0538977 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Niyazi, A. - Geffroy, D. - Kuneš, Jan
Dynamical response and competing orders in two-band Hubbard model.
Physical Review B. Roč. 102, č. 8 (2020), s. 1-9, č. článku 085159. ISSN 2469-9950. E-ISSN 2469-9969
Institucionální podpora: RVO:68378271
Klíčová slova: dynamical mean-field theory * exciton condensation * supersolid
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.036, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.102.085159

We present a dynamical mean-field study of two-particle dynamical response functions in a two-band Hubbardmodel across several phase transitions. We observe that the transition between the excitonic condensate andspin-state ordered state is continuous with a narrow strip of supersolid phase separating the two. Approachingtransition from the excitonic condensate is announced by softening of the excitonic mode at theMpoint of theBrillouin zone. Inside the spin-state ordered phase there is a magnetically ordered state with 2×2 periodicity,which has no precursor in the normal phase.
Trvalý link: http://hdl.handle.net/11104/0316708