Electrically Controllable Chiral Phonons in Ferroelectric Materials
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866913355184209920 |
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| author | Chen, Hao Wu, Weikang Sun, Kangtai Yang, Shengyuan A. Zhang, Lifa |
| author_facet | Chen, Hao Wu, Weikang Sun, Kangtai Yang, Shengyuan A. Zhang, Lifa |
| contents | Chiral phonons have attracted increasing attention, as they play important roles in many different systems and processes. However, a method to control phonon chirality by external fields is still lacking. Here, we propose that in displacement-type ferroelectric materials, an external electric field can reverse the chirality of chiral phonons via ferroelectric switching. Using first-principles calculations, we demonstrate this point in the well known two-dimensional ferroelectric In$_2$Se$_3$. This reversal may lead to a number of electrically switchable phenomena, such as chiral phonon induced magnetization, phonon Hall effect, and possible interface phonon modes at ferroelectric domain boundaries. Our work offers a new way to control chiral phonons, which could be useful for the design of thermal or information devices based on them. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2307_15927 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Electrically Controllable Chiral Phonons in Ferroelectric Materials Chen, Hao Wu, Weikang Sun, Kangtai Yang, Shengyuan A. Zhang, Lifa Materials Science Chiral phonons have attracted increasing attention, as they play important roles in many different systems and processes. However, a method to control phonon chirality by external fields is still lacking. Here, we propose that in displacement-type ferroelectric materials, an external electric field can reverse the chirality of chiral phonons via ferroelectric switching. Using first-principles calculations, we demonstrate this point in the well known two-dimensional ferroelectric In$_2$Se$_3$. This reversal may lead to a number of electrically switchable phenomena, such as chiral phonon induced magnetization, phonon Hall effect, and possible interface phonon modes at ferroelectric domain boundaries. Our work offers a new way to control chiral phonons, which could be useful for the design of thermal or information devices based on them. |
| title | Electrically Controllable Chiral Phonons in Ferroelectric Materials |
| topic | Materials Science |
| url | https://arxiv.org/abs/2307.15927 |