Large Photoelasticity in Topological Antiferromagnet Mn$_3$Sn Studied by Coherent Acoustic Phonon
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
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2026
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| _version_ | 1866912923082817536 |
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| author | Wang, Yuchen Matsuda, Takuya Murotani, Yuta Peng, Hanyi Matsuo, Takumi Higo, Tomoya Nakatsuji, Satoru Matsunaga, Ryusuke |
| author_facet | Wang, Yuchen Matsuda, Takuya Murotani, Yuta Peng, Hanyi Matsuo, Takumi Higo, Tomoya Nakatsuji, Satoru Matsunaga, Ryusuke |
| contents | We investigate the relation of electronic and optical properties to ultrafast strain in topological antiferromagnet Mn$_3$Sn thin films using near-infrared femtosecond laser pulses. Coherent acoustic phonon oscillations are generated and clearly identified with a remarkably large amplitude exceeding 1% in differential transmission. Quantitative analysis reveals that near-infrared photoelastic coefficient in Mn$_3$Sn is several times larger than that in typical materials. These results establish a quantitative approach for understanding the large optical responses to ultrafast strain in the topological kagome antiferromagnet, suggesting potential opto-spintronic and optoacoustic applications even at telecommunications wavelength. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20686 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Large Photoelasticity in Topological Antiferromagnet Mn$_3$Sn Studied by Coherent Acoustic Phonon Wang, Yuchen Matsuda, Takuya Murotani, Yuta Peng, Hanyi Matsuo, Takumi Higo, Tomoya Nakatsuji, Satoru Matsunaga, Ryusuke Materials Science We investigate the relation of electronic and optical properties to ultrafast strain in topological antiferromagnet Mn$_3$Sn thin films using near-infrared femtosecond laser pulses. Coherent acoustic phonon oscillations are generated and clearly identified with a remarkably large amplitude exceeding 1% in differential transmission. Quantitative analysis reveals that near-infrared photoelastic coefficient in Mn$_3$Sn is several times larger than that in typical materials. These results establish a quantitative approach for understanding the large optical responses to ultrafast strain in the topological kagome antiferromagnet, suggesting potential opto-spintronic and optoacoustic applications even at telecommunications wavelength. |
| title | Large Photoelasticity in Topological Antiferromagnet Mn$_3$Sn Studied by Coherent Acoustic Phonon |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.20686 |