Evidence of topological insulator state in the semimetal LaBi
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
2017
发表期刊PHYSICAL REVIEW B
ISSN2469-9950
卷号95期号:11页码:-
文章类型期刊论文
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.
DOI10.1103/PhysRevB.95.115140
收录类别SCI
语种英语
WOS记录号WOS:000399216900001
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27318
专题中科院上海应用物理研究所2011-2018年
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Lou, R,Fu, BB,Xu, QN,et al. Evidence of topological insulator state in the semimetal LaBi[J]. PHYSICAL REVIEW B,2017,95(11):-.
APA Lou, R.,Fu, BB.,Xu, QN.,Guo, PJ.,Kong, LY.,...&Wang, SC.(2017).Evidence of topological insulator state in the semimetal LaBi.PHYSICAL REVIEW B,95(11),-.
MLA Lou, R,et al."Evidence of topological insulator state in the semimetal LaBi".PHYSICAL REVIEW B 95.11(2017):-.
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