Observation of a nodal chain with Dirac surface states in TiB2
Yi, CJ; Lv, BQ; Wu, QS; Fu, BB; Gao, X; Yang, M; Peng, XL; Li, M; Huang, YB; Richard, P; Shi, M; Li, G; Yazyev, OV; Shi, YG; Qian, T; Ding, H
2018
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号97期号:20页码:-
文章类型期刊论文
摘要Topological nodal-line semimetals (TNLSMs) are characterized by symmetry-protected band crossings extending along one-dimensional lines in momentum space. The nodal lines exhibit a variety of possible configurations, such as nodal ring, nodal link, nodal chain, and nodal knot. Here, using angle-resolved photoemission spectroscopy, we observe nodal rings on the orthogonal k(z) = 0 and k(x) = 0 planes of the Brillouin zone in TiB2. The nodal rings connect with each other on the intersecting line Gamma-Kof the orthogonal planes forming a remarkable nodal-chain structure. Furthermore, we observe surface states (SSs) on the (001) cleaved surface, which are consistent with the calculated SSs considering the contribution from both Ti and B terminations. The calculated SSs have novel Dirac-cone-like band structures, which are distinct from the usual drumhead SSs with a single flatband proposed in other TNLSMs.
关键词Wannier Functions Semimetal Discovery Fermions
DOI10.1103/PhysRevB.97.201107
收录类别SCI
语种英语
WOS记录号WOS:000432962700002
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29091
专题中科院上海应用物理研究所2011-2018年
作者单位1.Yi, CJ
2.Lv, BQ
3.Wu, QS
4.Fu, BB
5.Gao, X
6.Yang, M
7.Peng, XL
8.Li, M
9.Huang, YB
10.Richard, P
11.Shi, M
12.Li, G
13.Yazyev, OV
14.Shi, YG
15.Qian, T
16.Ding, H
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GB/T 7714
Yi, CJ,Lv, BQ,Wu, QS,et al. Observation of a nodal chain with Dirac surface states in TiB2[J]. PHYSICAL REVIEW B,2018,97(20):-.
APA Yi, CJ.,Lv, BQ.,Wu, QS.,Fu, BB.,Gao, X.,...&Ding, H.(2018).Observation of a nodal chain with Dirac surface states in TiB2.PHYSICAL REVIEW B,97(20),-.
MLA Yi, CJ,et al."Observation of a nodal chain with Dirac surface states in TiB2".PHYSICAL REVIEW B 97.20(2018):-.
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