Persistent three- and four-atom orbital molecules in the spinel AlV2O4
| Autor: | Simon A. J. Kimber, J. Paul Attfield, Alexander J. Browne |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Scattering Spinel 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Charge ordering Crystallography Transition metal 0103 physical sciences Atom engineering Molecule Condensed Matter::Strongly Correlated Electrons General Materials Science 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review Materials. 1 |
| ISSN: | 2475-9953 |
| DOI: | 10.1103/physrevmaterials.1.052003 |
| Popis: | Electronic instabilities in transition metal compounds can lead to ground states containing orbital molecules when direct metal-metal orbital interactions occur. The largest reported orbital molecules are V717+ heptamers that emerge below a 700 K charge ordering transition in the spinel AlV2O4. However, x-ray total scattering analysis shows that the apparent heptamers are actually pairs of spin-singlet V39+ trimers and V48+ tetramers, and that these orbital molecules persist to at least 1100 K although they become `hidden' by disorder in the average cubic structure above the charge ordering transition. |
| Databáze: | OpenAIRE |
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