High-Angular Momentum Excitations in Collinear Antiferromagnet FePS3

We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS3. Our measurements reveal an excitation that closely resembles the antiferromagnetic resonance mode typical of easy-axis antiferromagnets; nevertheless, it displays an unusual, four-times larger Zeem...

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Bibliographic Details
Published in:Nano letters 2022-12, Vol.22 (23), p.9741-9747
Main Authors: Wyzula, Jan, Mohelský, Ivan, Václavková, Diana, Kapuscinski, Piotr, Veis, Martin, Faugeras, Clément, Potemski, Marek, Zhitomirsky, Mike E., Orlita, Milan
Format: Article
Language:English
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Summary:We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS3. Our measurements reveal an excitation that closely resembles the antiferromagnetic resonance mode typical of easy-axis antiferromagnets; nevertheless, it displays an unusual, four-times larger Zeeman splitting in an applied magnetic field. We identify this excitation with an |S z | = 4 multipolar magnona single-ion 4-magnon bound statethat corresponds to a full reversal of a single magnetic moment of the Fe2+ ion. We argue that condensation of multipolar magnons in large-spin materials with a strong magnetic anisotropy can produce new exotic states.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.2c04111