Three-component fermions with surface Fermi arcs in tungsten carbide

doi:10.1038/s41567-017-0021-8

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Three-component fermions with surface Fermi arcs in tungsten carbide
	Ma, JZ ; He, JB ; Xu, YF ; Lv, BQ ; Chen, D ; Zhu, WL ; Zhang, S ; Kong, LY ; Gao, X ; Rong, LY ; Huang, YB ; Richard, P ; Xi, CY ; Choi, ES ; Shao, Y ; Wang, YL ; Gao, HJ ; Dai, X ; Fang, C ; Weng, HM ; Chen, GF ; Qian, T ; Ding, H
	2018
Source Publication	NATURE PHYSICS
ISSN	1745-2473
Volume	14 Issue:4 Pages:349-+
Subtype	期刊论文
Abstract	Topological Dirac and Weyl semimetals not only host quasiparticles analogous to the elementary fermionic particles in high-energy physics, but also have a non-trivial band topology manifested by gapless surface states, which induce exotic surface Fermi arcs(1,2). Recent advances suggest new types of topological semimetal, in which spatial symmetries protect gapless electronic excitations without high-energy analogues(3-11). Here, using angle-resolved photoemission spectroscopy, we observe triply degenerate nodal points near the Fermi level of tungsten carbide with space group P (6) over barm 2 (no. 187), in which the low-energy quasiparticles are described as three-component fermions distinct from Dirac and Weyl fermions. We further observe topological surface states, whose constant-energy contours constitute pairs of 'Fermi arcs' connecting to the surface projections of the triply degenerate nodal points, proving the non-trivial topology of the newly identified semimetal state.
Keyword	Total-energy Calculations Wave Basis-set Dirac Semimetals Weyl States Taas
DOI	10.1038/s41567-017-0021-8
Indexed By	SCI
Language	英语
WOS ID	WOS:000429434100013
Citation statistics	Cited Times:25[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/29190
Collection	中科院上海应用物理研究所2011-2018年
Affiliation	1.Ma, JZ 2.He, JB 3.Xu, YF 4.Lv, BQ 5.Chen, D 6.Zhu, WL 7.Zhang, S 8.Kong, LY 9.Gao, X 10.Rong, LY 11.Huang, YB 12.Richard, P 13.Xi, CY 14.Choi, ES 15.Shao, Y 16.Wang, YL 17.Gao, HJ 18.Dai, X 19.Fang, C 20.Weng, HM 21.Chen, GF 22.Qian, T 23.Ding, H
Recommended Citation GB/T 7714	Ma, JZ,He, JB,Xu, YF,et al. Three-component fermions with surface Fermi arcs in tungsten carbide[J]. NATURE PHYSICS,2018,14(4):349-+.
APA	Ma, JZ.,He, JB.,Xu, YF.,Lv, BQ.,Chen, D.,...&Ding, H.(2018).Three-component fermions with surface Fermi arcs in tungsten carbide.NATURE PHYSICS,14(4),349-+.
MLA	Ma, JZ,et al."Three-component fermions with surface Fermi arcs in tungsten carbide".NATURE PHYSICS 14.4(2018):349-+.

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