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Phononic Helical Nodal Lines with PT Protection in MoB2 | |
2019-12-13 | |
发表期刊 | PHYSICAL REVIEW LETTERS |
ISSN | 0031-9007 |
EISSN | 1079-7114 |
卷号 | 123期号:24 |
发表状态 | 已发表 |
DOI | 10.1103/PhysRevLett.123.245302 |
摘要 | While condensed matter systems host both fermionic and bosonic quasiparticles, reliably predicting and empirically verifying topological states is only mature for Fermionic electronic structures, leaving topological Bosonic excitations sporadically explored. This is unfortunate, as Bosonic systems such as phonons offer the opportunity to assess spinless band structures where nodal lines can be realized without invoking special additional symetries to protect against spin-orbit coupling. Here we combine first-principles calculations and meV-resolution inelastic x-ray scattering to demonstrate the first realization of parity-time reversal symmetry protected helical nodal lines in the phonon spectrum of MoB2. This structure is unique to phononic systems as the spin-orbit coupling present in electronic systems tends to lift the degeneracy away from high-symmetry locations. Our study establishes a protocol to accurately identify topological Bosonic excitations, opening a new route to explore exotic topological states in crystalline materials. |
URL | 查看原文 |
收录类别 | SCI ; SCIE ; EI |
资助项目 | Laboratory Directed Research and Development (LDRD) from Argonne National Laboratory by Office of Science, of the U.S. Department of Energy[DE-AC02-06CH11357] |
WOS研究方向 | Physics |
WOS类目 | Physics, Multidisciplinary |
WOS记录号 | WOS:000502798200011 |
出版者 | AMER PHYSICAL SOC |
WOS关键词 | MATRICES ; SCHEMES ; CATALOG ; ENERGY |
原始文献类型 | Article |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/104985 |
专题 | 物质科学与技术学院 物质科学与技术学院_硕士生 |
通讯作者 | Miao, H.; Lei, H. C.; Weng, H. M.; Dean, M. P. M. |
作者单位 | 1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan 4.Tokyo Inst Technol, Tokodai Inst Element Strategy, Midori Ku, Yokohama, Kanagawa 2268503, Japan 5.Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA 6.Renmin Univ China, Dept Phys, Beijing, Peoples R China 7.Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Microdevice, Beijing, Peoples R China 8.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 9.Argonne Natl Lab, Mat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA 10.Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA 11.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, T. T.,Miao, H.,Wang, Q.,et al. Phononic Helical Nodal Lines with PT Protection in MoB2[J]. PHYSICAL REVIEW LETTERS,2019,123(24). |
APA | Zhang, T. T..,Miao, H..,Wang, Q..,Lin, J. Q..,Cao, Y..,...&Dean, M. P. M..(2019).Phononic Helical Nodal Lines with PT Protection in MoB2.PHYSICAL REVIEW LETTERS,123(24). |
MLA | Zhang, T. T.,et al."Phononic Helical Nodal Lines with PT Protection in MoB2".PHYSICAL REVIEW LETTERS 123.24(2019). |
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