Informace o publikaci
Dynamical response and competing orders in two-band Hubbard model
| Autoři | |
|---|---|
| Rok publikování | 2020 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review B |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.085159 |
| Doi | http://dx.doi.org/10.1103/PhysRevB.102.085159 |
| Klíčová slova | Hubbard Model; Mean-Field Theory; Quantum Monte Carlo |
| Popis | We present a dynamical mean-field study of two-particle dynamical response functions in a two-band Hubbard model across several phase transitions. We observe that the transition between the excitonic condensate and spin-state ordered state is continuous with a narrow strip of supersolid phase separating the two. Approaching transition from the excitonic condensate is announced by softening of the excitonic mode at the M point of the Brillouin zone. Inside the spin-state ordered phase there is a magnetically ordered state with 2 x 2 periodicity, which has no precursor in the normal phase. |