50 citations · 335 across the 28 of their papers we have counts for
8 papers · 1 filter
Ferromagnetism of LaCoO films
Andrii Sotnikov, Kyo-Hoon Ahn, Jan Kuneš
We study ferromagnetic ordering and microscopic inhomogeneity in tensile strained LaCoO using numerical simulations. We argue that both phenomena originate from effective super…
Damping of spinful excitons in LaCoO by thermal fluctuations: Theory and experiment
Atsushi Hariki, Ru-Pan Wang, Andrii Sotnikov +7
We present Co -edge resonant inelastic x-ray scattering (RIXS) of bulk LaCoO across the thermally-induced spin-state crossover around 100~K. Owing to a high energy resolut…
Pressure-induced spin-state ordering in SrCoOF
Juan Fernández Afonso, Andrii Sotnikov, Atsushi Hariki +1
We study theoretically low-temperature phases of a recently synthesized compound SrCoOF under pressure. The analysis combining LDA+DMFT and a strong-coupling effective mode…
Suppression and revival of long-range ferromagnetic order in the multiorbital Fermi-Hubbard model
Andrii Sotnikov, Agnieszka Cichy, Jan Kuneš
By means of dynamical mean-field theory allowing for complete account of SU(2) rotational symmetry of interactions between spin-1/2 particles, we observe a strong effect of suppres…
Excitonic dispersion of the intermediate-spin state in LaCoO revealed by resonant inelastic X-ray scattering
Ru-Pan Wang, Atsushi Hariki, Andrii Sotnikov +9
More than 50 years ago the electron-hole attraction was proposed to drive narrow gap semiconductors or semimetals to a new phase, the excitonic insulator. The experimental proof of…
Theoretical investigation of excitonic magnetism in LaSrCoO
J. Fernández Afonso, A. Sotnikov, J. Kuneš
We use the LDA+U approach to search for possible ordered ground states of LaSrCoO. We find a staggered arrangement of magnetic multipoles to be stable over a broad range of Co…