Competing phases in a model of Pr-based cobaltites

0487390 - FZÚ 2018 RIV US eng J - Journal Article
Sotnikov, A. - Kuneš, Jan
Competing phases in a model of Pr-based cobaltites.
Physical Review B. Roč. 96, č. 24 (2017), s. 1-5, č. článku 245102. ISSN 2469-9950. E-ISSN 2469-9969
EU Projects: European Commission(XE) 646807 - EXMAG
Institutional support: RVO:68378271
Keywords : exciton * cobaltites * magnetism
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.813, year: 2017

Motivated by the physics of Pr-based cobaltites, we study the effect of the external magnetic field in the hole-doped two-band Hubbard model close to instabilities toward the excitonic condensation and ferromagnetic ordering. Using the dynamical mean-field theory we observe a field-driven suppression of the excitonic condensate. The onset of a magnetically ordered phase at the fixed chemical potential is accompanied by a sizable change of the electron density. This leads us to predict that Pr3+ abundance increases on the high-field side of the transition.
Permanent Link: http://hdl.handle.net/11104/0282051