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|Title:||Suppression of magnetism under pressure in FeS: A DFT+DMFT study|
|Authors:||Ushakov, A. V.|
Shorikov, A. O.
Anisimov, V. I.
Baranov, N. V.
Streltsov, S. V.
|Publisher:||American Physical Society|
|Citation:||Suppression of magnetism under pressure in FeS: A DFT+DMFT study / A. V. Ushakov, A. O. Shorikov, V. I. Anisimov, et al. — DOI 10.1103/PhysRevB.95.205116 // Physical Review B. — 2017. — Vol. 95. — Iss. 20. — 205116.|
|Abstract:||We investigate the evolution of the magnetic properties in FeS under pressure and show that these cannot be explained solely in terms of the spin-state transition from a high to low spin state due to an increase of the crystal field. Using a combination of density functional theory and dynamical mean-field theory (DFT+DMFT), our calculations show that at normal conditions the Fe2+ ions are in the 3d6 high-spin (S=2) state, with some admixture of a 3d7L (S=3/2) configuration, where L stands for the ligand hole. Suppressing the magnetic moment by uniform compression is related to a substantial increase in electron delocalization and occupation of several lower spin configurations. The electronic configuration of Fe ions cannot be characterized by a single ionic state, but only by a mixture of the 3d7L,3d8L2, and 3d9L3 configurations at pressures ∼7.5GPa. The local spin-spin correlation function shows well-defined local magnetic moment, corresponding to a large lifetime in the high spin state at normal conditions. Under pressure FeS demonstrates a transition to a mixed state with small lifetimes in each of the spin configurations. © 2017 American Physical Society.|
|Appears in Collections:||Научные публикации, проиндексированные в SCOPUS и WoS CC|
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