Possible absence of trimeron correlations above the Verwey temperature in Fe3O4
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 th...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
6 February 2020
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| In: |
Physical review
Year: 2020, Volume: 101, Issue: 8, Pages: 1-5 |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.101.085107 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1103/PhysRevB.101.085107 Verlag: https://link.aps.org/doi/10.1103/PhysRevB.101.085107 
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| Author Notes: | H. Elnaggar, R. Wang, S. Lafuerza, E. Paris, A.C. Komarek, H. Guo, Y. Tseng, D. McNally, F. Frati, M.W. Haverkort, M. Sikora, T. Schmitt, and F.M.F. de Groot |
| Summary: | 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. |
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| Item Description: | Im Titel ist die 3 bei Fe und die 4 bei O tiefgestellt Gesehen am 04.03.2020 |
| Physical Description: | Online Resource |
| ISSN: | 2469-9969 |
| DOI: | 10.1103/PhysRevB.101.085107 |