Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 17: Poster Session I

MA 17.75: Poster

Dienstag, 8. März 2016, 09:30–12:30, Poster B1

Excitonic condensation in d⁶ perovskites — •Juan Fernández Afonso¹ and Jan Kuneš² — ¹Institute of Physics of the Czech Academy of Sciences — ²Institute of Physics of the Czech Academy of Sciences

We study the possibility of excitonic condensation in transition metal perovskites with d⁶ configuration. Hartree-Fock-like LDA+U calculations have been performed for artificial cubic perovskite structure mimicking LaCoO₃. We find self-consistent solutions that correspond to several distinct ordered states. These arise from condensation of atomic size e_g−t_2g excitons and lead to periodic arrangement of magnetic multipoles. The symmetry properties and stability of the different solutions are analyzed.