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TT: Fachverband Tiefe Temperaturen
TT 101: Correlated Electrons: Other Materials
TT 101.10: Talk
Thursday, March 15, 2018, 18:00–18:15, HFT-FT 101
Competing phases in the model of Pr-based cobaltites — •Andrii Sotnikov and Jan Kuneš — Institute of Solid State Physics, TU Wien, Austria
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 towards 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 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.