Chiral phonons in sixfold chiral CrSi$_2$: Raman spectroscopy and first-principles calculations
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917282114961408 |
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| author | Kusuno, Gakuto Kisanuki, Shingo Kousaka, Yusuke Togawa, Yoshihiko Satoh, Takuya |
| author_facet | Kusuno, Gakuto Kisanuki, Shingo Kousaka, Yusuke Togawa, Yoshihiko Satoh, Takuya |
| contents | Chiral phonons have been identified in several chiral crystals, primarily in those with trigonal symmetry and threefold screw axes. In this study, chiral phonons in CrSi$_2$, a chiral crystal with a sixfold helical structure, were investigated. Circularly polarized Raman spectroscopy revealed a subtle splitting of doubly degenerate $E_2$ phonon modes between cross-circular polarization configurations. These observations, supported by first-principles phonon calculations, indicate the presence of chiral phonons in CrSi$_2$, expanding the scope of materials that exhibit chiral vibrational modes beyond the conventional trigonal class. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17362 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Chiral phonons in sixfold chiral CrSi$_2$: Raman spectroscopy and first-principles calculations Kusuno, Gakuto Kisanuki, Shingo Kousaka, Yusuke Togawa, Yoshihiko Satoh, Takuya Materials Science Chiral phonons have been identified in several chiral crystals, primarily in those with trigonal symmetry and threefold screw axes. In this study, chiral phonons in CrSi$_2$, a chiral crystal with a sixfold helical structure, were investigated. Circularly polarized Raman spectroscopy revealed a subtle splitting of doubly degenerate $E_2$ phonon modes between cross-circular polarization configurations. These observations, supported by first-principles phonon calculations, indicate the presence of chiral phonons in CrSi$_2$, expanding the scope of materials that exhibit chiral vibrational modes beyond the conventional trigonal class. |
| title | Chiral phonons in sixfold chiral CrSi$_2$: Raman spectroscopy and first-principles calculations |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.17362 |