| Title: |
Possible absence of trimeron correlations above the Verwey temperature in Fe3 O4 |
| Authors: |
Elnaggar, H.; Wang, R.; Lafuerza, S.; Paris, E.; Komarek, A. C.; Guo, H.; Tseng, Y.; McNally, D.; Frati, F.; Haverkort, M. W.; Sikora, M.; Schmitt, T.; De Groot, F. M.F.; Sub Inorganic Chemistry and Catalysis; LS Virologie; Inorganic Chemistry and Catalysis |
| Publication Year: |
2020 |
| Subject Terms: |
Taverne; Electronic; Optical and Magnetic Materials; Condensed Matter Physics |
| Description: |
The origin of the metal to insulator transition in Fe3O4 remains a challenge due to the complexity of the system: It is a mixed valent, strongly correlated system where many interactions such as Jahn-Teller distortion, exchange, and phonons are very close in energetics. A recent interpretation of the Verwey transition as an ordering of a three-site magnetic polaron, the trimeron, has been put forward. Here we investigate the existence of the trimeron correlations in the high-temperature phase of Fe3O4 using high-resolution iron 2p3d resonant inelastic scattering magnetic linear dichroism. Guided by theoretical simulations, we reveal that the polarization dependence of the low-energy spin-orbital excitations is incompatible with tetragonal Jahn-Teller trimeron-type distortion. We conclude that the lowest-energy state of the high-temperature phase of Fe3O4 arises from an intricate interplay between trigonal crystal-field, exchange, and spin-orbit interactions. |
| Document Type: |
article in journal/newspaper |
| File Description: |
text/plain |
| Language: |
English |
| ISSN: |
2469-9950 |
| Relation: |
https://dspace.library.uu.nl/handle/1874/411223 |
| Availability: |
https://dspace.library.uu.nl/handle/1874/411223 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.142EC5E1 |
| Database: |
BASE |