Phononic Weyl Nodal Lines and Weyl Pairs in van der Waals Heavy Fermion Material CeSiI

doi:10.1088/0256-307X/41/10/107301

IMR OpenIR

	Phononic Weyl Nodal Lines and Weyl Pairs in van der Waals Heavy Fermion Material CeSiI
	Li, Fulei 1,2; Yu, Tianye 2; Lai, Junwen 2; Liu, Jiaxi 2; Liu, Peitao 2; Chen, Xing-Qiu 2; Sun, Yan 2
通讯作者	Yu, Tianye(tyyu@imr.ac.cn) ; Chen, Xing-Qiu(xingqiu.chen@imr.ac.cn) ; Sun, Yan(yansunning@outlook.com)
	2024-11-01
发表期刊	CHINESE PHYSICS LETTERS
ISSN	0256-307X
卷号	41 期号:10 页码:6
摘要	Topological phonon is a new frontier in the field of topological materials. Different from electronic structures, phonons are bosons and most topological phonons are metallic form. Previous studies about topological phonon states were focused on three-dimensional (3D) materials. Owing to the lack of material candidates, two-dimensional (2D) and van der Waals f-electron-related topological phonons were rarely reported. Based on first-principles calculations, we investigate the topological phononic state in the heavy fermion material CeSiI with a layered structure. Both 3D bulk and 2D monolayers have topological nontrivial states in the rarely seen f electron dominated van der Waals metal. Owing to the PT and C-3z symmetries, Weyl nodal lines with nonzero Chern numbers exist on the hinge of the Brillouin zone. Protected by C-3z rotation symmetry, three pairs of Weyl points with +/-pi Berry phase exist at point K near the frequency of 8 and 10 THz. In addition to the bulk topological charges, corresponding surface/edge states are also systematically analyzed, which gives a consistent understanding. Our results propose another interesting point in the newly discovered rear earth heavy fermion material CeSiI and are helpful for future experimental research of CeSiI topological phonons.
资助者	National Key R&D Program of China ; National Natural Science Foundation of China ; Liaoning Province
DOI	10.1088/0256-307X/41/10/107301
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2021YFB3501503] ; National Natural Science Foundation of China[52271016] ; National Natural Science Foundation of China[52188101] ; Liaoning Province[XLYC2203080] ; Liaoning Province[DFZX202319]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:001358796900001
出版者	IOP Publishing Ltd
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191733
专题	中国科学院金属研究所
通讯作者	Yu, Tianye; Chen, Xing-Qiu; Sun, Yan
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Fulei,Yu, Tianye,Lai, Junwen,et al. Phononic Weyl Nodal Lines and Weyl Pairs in van der Waals Heavy Fermion Material CeSiI[J]. CHINESE PHYSICS LETTERS,2024,41(10):6.
APA	Li, Fulei.,Yu, Tianye.,Lai, Junwen.,Liu, Jiaxi.,Liu, Peitao.,...&Sun, Yan.(2024).Phononic Weyl Nodal Lines and Weyl Pairs in van der Waals Heavy Fermion Material CeSiI.CHINESE PHYSICS LETTERS,41(10),6.
MLA	Li, Fulei,et al."Phononic Weyl Nodal Lines and Weyl Pairs in van der Waals Heavy Fermion Material CeSiI".CHINESE PHYSICS LETTERS 41.10(2024):6.