Raman Fingerprints of Phase Transitions and Ferroic Couplings in Van der Waals Material CuCrP$_2$S$_6$
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| author | Tang, Jing Lawrie, Benjamin J Cheng, Mouyang Wu, Yueh-Chun Zhao, Huan Kong, Dejia Lu, Ruiqi Yao, Ching-Hsiang Gai, Zheng Li, An-Ping Li, Mingda Ling, Xi |
| author_facet | Tang, Jing Lawrie, Benjamin J Cheng, Mouyang Wu, Yueh-Chun Zhao, Huan Kong, Dejia Lu, Ruiqi Yao, Ching-Hsiang Gai, Zheng Li, An-Ping Li, Mingda Ling, Xi |
| contents | CuCrP$_2$S$_6$ (CCPS), a type-II multiferroic material, exhibits unique phase transitions involving ferroelectric, antiferroelectric, and antiferromagnetic ordering. In this study, we conduct a comprehensive investigation on the intricate phase transitions and their multiferroic couplings in CCPS across a wide temperature range from 4 to 345 K through Raman spectroscopic measurements down to 5 cm$^{-1}$. We first assign the observed Raman modes with the support of theoretical calculations and angle-resolved polarized Raman measurements. We further present clear signatures of phase transitions from analyses of temperature-dependent Raman spectral parameters. Particularly, two low-frequency soft modes are observed at 36.1 cm$^{-1}$ and 70.5 cm$^{-1}$ below 145 K, indicating the antiferroelectric to quasi-antiferroelectric transition. Moreover, phonon modes hardening is observed when the temperature increases from 4 to 65 K, suggesting negative thermal expansion (NTE) and strong magnetoelastic coupling below 65 K. These findings advance the understanding of vdW multiferroic CCPS, paving the way for future design and engineering of multiferroicity in cutting-edge technologies, such as spintronics and quantum devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_10899 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Raman Fingerprints of Phase Transitions and Ferroic Couplings in Van der Waals Material CuCrP$_2$S$_6$ Tang, Jing Lawrie, Benjamin J Cheng, Mouyang Wu, Yueh-Chun Zhao, Huan Kong, Dejia Lu, Ruiqi Yao, Ching-Hsiang Gai, Zheng Li, An-Ping Li, Mingda Ling, Xi Materials Science CuCrP$_2$S$_6$ (CCPS), a type-II multiferroic material, exhibits unique phase transitions involving ferroelectric, antiferroelectric, and antiferromagnetic ordering. In this study, we conduct a comprehensive investigation on the intricate phase transitions and their multiferroic couplings in CCPS across a wide temperature range from 4 to 345 K through Raman spectroscopic measurements down to 5 cm$^{-1}$. We first assign the observed Raman modes with the support of theoretical calculations and angle-resolved polarized Raman measurements. We further present clear signatures of phase transitions from analyses of temperature-dependent Raman spectral parameters. Particularly, two low-frequency soft modes are observed at 36.1 cm$^{-1}$ and 70.5 cm$^{-1}$ below 145 K, indicating the antiferroelectric to quasi-antiferroelectric transition. Moreover, phonon modes hardening is observed when the temperature increases from 4 to 65 K, suggesting negative thermal expansion (NTE) and strong magnetoelastic coupling below 65 K. These findings advance the understanding of vdW multiferroic CCPS, paving the way for future design and engineering of multiferroicity in cutting-edge technologies, such as spintronics and quantum devices. |
| title | Raman Fingerprints of Phase Transitions and Ferroic Couplings in Van der Waals Material CuCrP$_2$S$_6$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2504.10899 |