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题名:
Evidence of topological insulator state in the semimetal LaBi
作者: Lou, R; Fu, BB; Xu, QN; Guo, PJ; Kong, LY; Zeng, LK; Ma, JZ; Richard, P; Fang, C; Huang, YB; Sun, SS; Wang, Q; Wang, L; Shi, YG; Lei, HC; Liu, K; Weng, HM; Qian, T; Ding, H; Wang, SC
刊名: PHYSICAL REVIEW B
出版日期: 2017
卷号: 95, 期号:11, 页码:-
DOI: 10.1103/PhysRevB.95.115140
文章类型: 期刊论文
英文摘要: By employing angle-resolved photoemission spectroscopy combined with first-principles calculations, we performed a systematic investigation on the electronic structure of LaBi, which exhibits extremely large magnetoresistance (XMR), and is theoretically predicted to possess band anticrossing with nontrivial topological properties. Here, the observations of the Fermi-surface topology and band dispersions are similar to previous studies on LaSb [L.-K. Zeng, R. Lou, D.-S. Wu, Q.N. Xu, P.-J. Guo, L.-Y. Kong, Y.-G. Zhong, J.-Z. Ma, B.-B. Fu, P. Richard, P. Wang, G. T. Liu, L. Lu, Y.-B. Huang, C. Fang, S.-S. Sun, Q. Wang, L. Wang, Y.-G. Shi, H. M. Weng, H.-C. Lei, K. Liu, S.-C. Wang, T. Qian, J.-L. Luo, and H. Ding, Phys. Rev. Lett. 117, 127204 (2016)], a topologically trivial XMR semimetal, except the existence of a band inversion along the Gamma-X direction, with one massless and one gapped Dirac-like surface state at the X and Gamma points, respectively. The odd number of massless Dirac cones suggests that LaBi is analogous to the time-reversal Z(2) nontrivial topological insulator. These findings open up a new series for exploring novel topological states and investigating their evolution from the perspective of topological phase transition within the family of rare-earth monopnictides.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000399216900001
ISSN号: 2469-9950
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27318
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Lou, R,Fu, BB,Xu, QN,et al. Evidence of topological insulator state in the semimetal LaBi[J]. PHYSICAL REVIEW B,2017-01-01,95(11):-.
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