High-angular momentum excitations in collinear antiferromagnet FePS$_3$
| Title: | High-angular momentum excitations in collinear antiferromagnet FePS$_3$ |
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| Authors: | Wyzula, Jan, Mohelsky, Ivan, Vaclavkova, Diana, Kapuscinski, Piotr, Veis, Martin, Faugeras, Clement, Potemski, Marek, Zhitomirsky, Mike E., Orlita, Milan |
| Source: | Nano Letters 22, 9741 (2022) |
| Publication Year: | 2022 |
| Collection: | Condensed Matter |
| Subject Terms: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| More Details: | We report on magneto-optical studies of the quasi-two-dimensional van der Waals antiferromagnet FePS$_3$. 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 Fe$^{2+}$ ion. We argue that condensation of multipolar magnons in large-spin materials with a strong magnetic anisotropy can produce new exotic states. Comment: 7 pages, 3 figures + supplement |
| Document Type: | Working Paper |
| DOI: | 10.1021/acs.nanolett.2c04111 |
| Access URL: | http://arxiv.org/abs/2212.07221 |
| Accession Number: | edsarx.2212.07221 |
| Database: | arXiv |
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