Chiral phonon diode effect in chiral crystals

The diode effect means that carriers can only flow in one direction but not the other. While diode effects for electron charge, spin, or photon have been widely discussed, it remains a question whether a chiral phonon diode can be realized, which utilizes the chiral degree of freedom of lattice vibr...

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Main Authors: Chen, Hao, Wu, Weikang, Zhu, Jiaojiao, Yang, Zhengning, Gong, Weikang, Gao, Weibo, Yang, Shengyuan A., Zhang, Lifa
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/162166
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1621662022-10-06T08:41:59Z Chiral phonon diode effect in chiral crystals Chen, Hao Wu, Weikang Zhu, Jiaojiao Yang, Zhengning Gong, Weikang Gao, Weibo Yang, Shengyuan A. Zhang, Lifa School of Physical and Mathematical Sciences Science::Physics Chiral Crystals Chiral Phonon Diode Effect The diode effect means that carriers can only flow in one direction but not the other. While diode effects for electron charge, spin, or photon have been widely discussed, it remains a question whether a chiral phonon diode can be realized, which utilizes the chiral degree of freedom of lattice vibrations. In this work, we reveal an intrinsic connection between the chiralities of a crystal structure and its phonon excitations, which naturally leads to the chiral phonon diode effect in chiral crystals. At a certain frequency, phonons with a definite chirality can propagate only in one direction but not the opposite. We demonstrate the idea in concrete materials including bulk Te and α-quartz (SiO2). Our work discovers the fundamental physics of chirality coupling between different levels of a system, and the predicted effect will provide a new route to control phonon transport and design information devices. Ministry of Education (MOE) This work was supported by NSFC (11890703, 11975125) and Singapore MOE AcRF Tier 2 (MOE2019-T2-1-001). H.C. was also supported by China Scholarship Council. 2022-10-06T08:41:58Z 2022-10-06T08:41:58Z 2022 Journal Article Chen, H., Wu, W., Zhu, J., Yang, Z., Gong, W., Gao, W., Yang, S. A. & Zhang, L. (2022). Chiral phonon diode effect in chiral crystals. Nano Letters, 22(4), 1688-1693. https://dx.doi.org/10.1021/acs.nanolett.1c04705 1530-6984 https://hdl.handle.net/10356/162166 10.1021/acs.nanolett.1c04705 35148114 2-s2.0-85125020274 4 22 1688 1693 en MOE2019-T2-1-001 Nano Letters © 2022 American Chemical Society. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Chiral Crystals
Chiral Phonon Diode Effect
spellingShingle Science::Physics
Chiral Crystals
Chiral Phonon Diode Effect
Chen, Hao
Wu, Weikang
Zhu, Jiaojiao
Yang, Zhengning
Gong, Weikang
Gao, Weibo
Yang, Shengyuan A.
Zhang, Lifa
Chiral phonon diode effect in chiral crystals
description The diode effect means that carriers can only flow in one direction but not the other. While diode effects for electron charge, spin, or photon have been widely discussed, it remains a question whether a chiral phonon diode can be realized, which utilizes the chiral degree of freedom of lattice vibrations. In this work, we reveal an intrinsic connection between the chiralities of a crystal structure and its phonon excitations, which naturally leads to the chiral phonon diode effect in chiral crystals. At a certain frequency, phonons with a definite chirality can propagate only in one direction but not the opposite. We demonstrate the idea in concrete materials including bulk Te and α-quartz (SiO2). Our work discovers the fundamental physics of chirality coupling between different levels of a system, and the predicted effect will provide a new route to control phonon transport and design information devices.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Chen, Hao
Wu, Weikang
Zhu, Jiaojiao
Yang, Zhengning
Gong, Weikang
Gao, Weibo
Yang, Shengyuan A.
Zhang, Lifa
format Article
author Chen, Hao
Wu, Weikang
Zhu, Jiaojiao
Yang, Zhengning
Gong, Weikang
Gao, Weibo
Yang, Shengyuan A.
Zhang, Lifa
author_sort Chen, Hao
title Chiral phonon diode effect in chiral crystals
title_short Chiral phonon diode effect in chiral crystals
title_full Chiral phonon diode effect in chiral crystals
title_fullStr Chiral phonon diode effect in chiral crystals
title_full_unstemmed Chiral phonon diode effect in chiral crystals
title_sort chiral phonon diode effect in chiral crystals
publishDate 2022
url https://hdl.handle.net/10356/162166
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