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 In2Se3. This reversal may lead to a number of electrically switchable phenomena, such as chiral phonon induced magnetization, the phonon Hall effect, and possible topological interface chiral phonon modes at ferroelectric domain boundaries. Our work offers a way to control chiral phonons, which could be useful for the design and application of thermal or information devices based on them.
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Electrically controllable chiral phonons in ferroelectric materials
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26 February 2024
Research Article|
February 26 2024
Electrically controllable chiral phonons in ferroelectric materials
Special Collection:
Topological and Chiral Matter – Physics and Applications
Hao Chen
;
Hao Chen
(Conceptualization, Investigation, Software, Writing – original draft, Writing – review & editing)
1
Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University
, Nanjing 210023, China
2
Department of Physics, University of Science and Technology of China
, Hefei 230026, China
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Weikang Wu;
Weikang Wu
(Conceptualization, Investigation)
3
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University
, Jinan 250061, China
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Kangtai Sun;
Kangtai Sun
(Investigation, Software)
4
Department of Physics, National University of Singapore
, Singapore 117551, Republic of Singapore
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Shengyuan A. Yang;
Shengyuan A. Yang
a)
(Supervision, Writing – review & editing)
5
Institute of Applied Physics and Materials Engineering, University of Macau
, Taipa 999078, China
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Lifa Zhang
Lifa Zhang
a)
(Funding acquisition, Supervision, Writing – review & editing)
1
Phonon Engineering Research Center of Jiangsu Province, Center for Quantum Transport and Thermal Energy Science, Institute of Physics Frontiers and Interdisciplinary Sciences, School of Physics and Technology, Nanjing Normal University
, Nanjing 210023, China
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Appl. Phys. Lett. 124, 092201 (2024)
Article history
Received:
January 09 2024
Accepted:
February 06 2024
Citation
Hao Chen, Weikang Wu, Kangtai Sun, Shengyuan A. Yang, Lifa Zhang; Electrically controllable chiral phonons in ferroelectric materials. Appl. Phys. Lett. 26 February 2024; 124 (9): 092201. https://doi.org/10.1063/5.0196731
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