| 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 Author | Yunoki, Seiji(yunoki@riken.jp) ; Chen, Xing-Qiu(xingqiu.chen@imr.ac.cn) |
| 2019-05-16 | |
| Source Publication | PHYSICAL REVIEW B
 |
| ISSN | 2469-9950 |
| Volume | 99Issue:17Pages:16 |
| Abstract | 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. |
| Funding Organization | National Science Fund for Distinguished Young Scholars ; National Natural Science Foundation of China ; Science Challenging Project ; International Program Association (IPA) program of RIKEN |
| DOI | 10.1103/PhysRevB.99.174306 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000468204500001 |
| Publisher | AMER PHYSICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/133342 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yunoki, Seiji; Chen, Xing-Qiu |
| Affiliation | 1.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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