Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164342
Title: Symmetry-enforced nodal chain phonons
Authors: Zhu, Jiaojiao 
Wu, Weikang
Zhao, Jianzhou
Chen, Hao
Zhang, Lifa
Yang, Shengyuan A.
Keywords: Science::Physics
Issue Date: 2022
Source: Zhu, J., Wu, W., Zhao, J., Chen, H., Zhang, L. & Yang, S. A. (2022). Symmetry-enforced nodal chain phonons. Npj Quantum Materials, 7(1), 1-6. https://dx.doi.org/10.1038/s41535-022-00461-7
Project: MOE2019-T2-1-001 
Journal: npj Quantum Materials 
Abstract: Topological phonons in crystalline materials have been attracting great interest. Most cases studied so far are direct generalizations of the topological states from electronic systems. Here, we reveal a class of topological phonons - the symmetry-enforced nodal-chain phonons, which manifest the characteristic of phononic systems. We show that in five space groups with D2d little co-group at a non-time-reversal-invariant-momentum point, the phononic nodal chain is guaranteed to exist owing to the vector basis symmetry of phonons, which is a character distinct from electronic and other systems. In other words, this symmetry enforcement feature of the proposed nodal chain is limited to phononic systems. Interestingly, the chains in these five space groups exhibit two different patterns: for tetragonal systems, they are one-dimensional along the fourfold axis; for cubic systems, they form a three-dimensional network structure. Based on first-principles calculations, we identify K2O as a realistic material hosting the proposed nodal-chain phonons. We show that the effect of LO-TO splitting helps to expose the nodal-chain phonons in a large frequency window. In addition, the nodal chains may lead to drumhead surface phonon modes on multiple surfaces of a sample.
URI: https://hdl.handle.net/10356/164342
ISSN: 2397-4648
DOI: 10.1038/s41535-022-00461-7
Schools: School of Physical and Mathematical Sciences 
Rights: © The Author(s) 2022. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons. org/licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
s41535-022-00461-7.pdf1.49 MBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 20

18
Updated on Feb 13, 2024

Web of ScienceTM
Citations 20

9
Updated on Oct 27, 2023

Page view(s)

82
Updated on Feb 12, 2024

Download(s)

13
Updated on Feb 12, 2024

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.