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Phononic Weyl points and one-way topologically protected nontrivial phononic surface arc states in noncentrosymmetric WC-type materials
Xie, Qing1,2,3; Li, Jiangxu1,4; Ullah, Sami1,2; Li, Ronghan1,4; Wang, Lei1,4; Li, Dianzhong1,4; Li, Yiyi1,4; Yunoki, Seiji3,5,6; Chen, Xing-Qiu1,4
Corresponding AuthorYunoki, Seiji(yunoki@riken.jp) ; Chen, Xing-Qiu(xingqiu.chen@imr.ac.cn)
2019-05-16
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume99Issue:17Pages:16
AbstractBy 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.
Funding OrganizationNational Science Fund for Distinguished Young Scholars ; National Natural Science Foundation of China ; Science Challenging Project ; International Program Association (IPA) program of RIKEN
DOI10.1103/PhysRevB.99.174306
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000468204500001
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/133342
Collection中国科学院金属研究所
Corresponding AuthorYunoki, Seiji; Chen, Xing-Qiu
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan
4.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
5.RIKEN, Computat Mat Sci Res Team, AICS, Kobe, Hyogo 6500047, Japan
6.RIKEN, Computat Quantum Matter Res Team, CEMS, Wako, Saitama 3510198, Japan
Recommended Citation
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.
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