Identifying band structure changes of FePS3 across the antiferromagnetic phase transition
Magnetic 2D materials enable novel tuning options of magnetism. As an example, the van der Waals material FePS3, a zigzag-type intralayer antiferromagnet, exhibits very strong magnetoelastic coupling due to the different bond lengths along different ferromagnetic and antiferromagnetic coupling direc...
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Main Authors | , , , , , , , , , , , , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
23.08.2024
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Subjects | |
Online Access | Get full text |
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Summary: | Magnetic 2D materials enable novel tuning options of magnetism. As an
example, the van der Waals material FePS3, a zigzag-type intralayer
antiferromagnet, exhibits very strong magnetoelastic coupling due to the
different bond lengths along different ferromagnetic and antiferromagnetic
coupling directions enabling elastic tuning of magnetic properties. The likely
cause of the length change is the intricate competition between direct exchange
of the Fe atoms and superexchange via the S and P atoms. To elucidate this
interplay, we study the band structure of exfoliated FePS3 by mu m scale ARPES
(Angular Resolved Photoelectron Spectroscopy), both, above and, for the first
time, below the Neel temperature TN. We find three characteristic changes
across TN. They involve S 3p-type bands, Fe 3d-type bands and P 3p-type bands,
respectively, as attributed by comparison with density functional theory
calculations (DFT+U). This highlights the involvement of all the atoms in the
magnetic phase transition providing independent evidence for the intricate
exchange paths. |
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DOI: | 10.48550/arxiv.2408.12896 |