Three-site transition-metal clusters: going from localized electrons to molecular orbitals
| Autor: | Sergey V. Streltsov, Daniel I. Khomskii, Evgenia V. Komleva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
AB INITIO CALCULATIONS
GRADUAL TRANSITION Materials science Gradual transition FOS: Physical sciences 02 engineering and technology Electron TRANSITION-METAL CLUSTERS 01 natural sciences Metal Condensed Matter - Strongly Correlated Electrons Transition metal Ab initio quantum chemistry methods 0103 physical sciences MOLECULAR ORBITALS Molecular orbital Isostructural TRANSITION METAL COMPOUNDS 5D TRANSITION METALS 010306 general physics Strongly Correlated Electrons (cond-mat.str-el) METAL-METAL DISTANCES TRANSITION METALS 021001 nanoscience & nanotechnology Transition metal ions LOCALIZED ELECTRONS CALCULATIONS Crystallography visual_art ELECTRONIC AND MAGNETIC PROPERTIES visual_art.visual_art_medium Condensed Matter::Strongly Correlated Electrons ISOSTRUCTURAL COMPOUNDS 0210 nano-technology METAL IONS |
| Zdroj: | Phys. Rev. B Physical Review B |
| Popis: | Investigation of the recently synthesized series of isostructural compounds Ba4NbTM3O12 (TM=Mn, Rh, and Ir) with transition-metal trimers in a face-sharing geometry makes it possible to examine a tendency to the molecular orbitals (MO) formation going from 3d to 5d transition metal ions. Our ab initio calculations of electronic and magnetic properties describe the experimental findings and demonstrate gradual transition from the picture of localized electrons for Mn to the MO picture for Rh and especially for Ir. We also show that the often used criterion, according to which the metal-metal distance in a compound shorter than in a respective metal always gives MO, may break down in some cases. © 2020 American Physical Society. We are grateful to R.J. Cava for introducing us to trimer-based hexagonal perovskites and for various fruitful discussions. This research was supported by the Russian Foundation for Basic Researches (Grants No. RFBR 20-32-70019 and RFBR 20-32-90073) and the Russian Ministry of Science and High Education via program “Quantum” (Grant No. AAAA-A18-118020190095-4) and Contract No. 02.A03.21.0006 and the Deutche Forschungsgemeinschaft (DFG, German Reseach Foundation), Project No. 277146847-CRC 1238. |
| Databáze: | OpenAIRE |
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