Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials

doi:10.1103/PhysRevB.99.174306

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	Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials
	Xie, Qing 2,3,4; Li, Jiangxu 2,5; Ullah, Sami 2,3; Li, Ronghan 2,5; Wang, Lei 2,5; Li, Dianzhong 2,5; Li, Yiyi 2,5; Yunoki, Seiji 1,4,6; Chen, Xing-Qiu 2,5
刊名	PHYSICAL REVIEW B
	2019-05-16
卷号	99 期号:17 页码:16
ISSN号	2469-9950
DOI	10.1103/PhysRevB.99.174306
通讯作者	Yunoki, Seiji(yunoki@riken.jp) ; Chen, Xing-Qiu(xingqiu.chen@imr.ac.cn)
英文摘要	By means of first-principles calculations, we have predicted the existence of phononic Weyl points (WPs) along the high-symmetric K(1/3, 1/3, 0)-H(1/3, 1/3, 1/2) line in the Brillouin zone for a series of noncentrosymmetric 3 1 , 2 hexagonal WC-type materials (HfS, HfSe, IrB, MoC, MoN, MoP, NbN, NbS, TaN, TaS, TiO, TiS, WN, ZrS, ZrSe, and ZrTe) and these WPs carry nonzero topological charges. In terms of symmetry analysis, we have further derived two-band k . p models to describe these WPs. For most WPs a first-order theory is sufficient to reproduce well the phonon spectra around these WPs. However, for some WPs a second-order theory has to be required. Particularly, when the second-order term plays a leading role, a topological charge +/- 1 WP on the K-H line is accompanied by three nearby WPs with the opposite charges (-/+ 1) off the K-H line. These four spatially close (in the reciprocal space) WPs have a total topological charge of -/+ 2. On the crystal (10 (1) over bar0) and (01 (1) over bar0) surfaces, we have observed clear one-way topologically protected nontrivial phononic surface arc states connecting two WPs with opposite chirality. Our results pave the way for future experimental studies of the topological phonons for those WC-type materials.
资助项目	National Science Fund for Distinguished Young Scholars[51725103] ; National Natural Science Foundation of China[51671193] ; National Natural Science Foundation of China[51474202] ; Science Challenging Project[TZ2016004] ; International Program Association (IPA) program of RIKEN
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000468204500001
资助机构	National Science Fund for Distinguished Young Scholars ; National Natural Science Foundation of China ; Science Challenging Project ; International Program Association (IPA) program of RIKEN
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133343]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yunoki, Seiji; Chen, Xing-Qiu
作者单位	1.RIKEN, Computat Quantum Matter Res Team, CEMS, Wako, Saitama 3510198, Japan 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 6.RIKEN, Computat Mat Sci Res Team, AICS, Kobe, Hyogo 6500047, Japan
推荐引用方式 GB/T 7714	Xie, Qing,Li, Jiangxu,Ullah, Sami,et al. Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials[J]. PHYSICAL REVIEW B,2019,99(17):16.
APA	Xie, Qing.,Li, Jiangxu.,Ullah, Sami.,Li, Ronghan.,Wang, Lei.,...&Chen, Xing-Qiu.(2019).Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials.PHYSICAL REVIEW B,99(17),16.
MLA	Xie, Qing,et al."Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials".PHYSICAL REVIEW B 99.17(2019):16.