Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb

doi:10.1126/sciadv.1602415

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb
	Ma, JZ; Yi, CJ; Lv, BQ; Wang, ZJ; Nie, SM; Wang, L; Kong, LY; Huang, YB; Richard, P; Zhang, P
刊名	SCIENCE ADVANCES
	2017
卷号	3 期号:5 页码:-
关键词	Semimetal
ISSN号	2375-2548
DOI	10.1126/sciadv.1602415
文献子类	期刊论文
英文摘要	Topological insulators (TIs) host novel states of quantum matter characterized by nontrivial conducting boundary states connecting valence and conduction bulk bands. All TIs discovered experimentally so far rely on either time-reversal or mirror crystal symmorphic symmetry to protect massless Dirac-like boundary states. Several materials were recently proposed to be TIs with nonsymmorphic symmetry, where a glide mirror protects exotic surface fermions with hourglass-shaped dispersion. However, an experimental confirmation of this new fermion is missing. Using angle-resolved photoemission spectroscopy, we provide experimental evidence of hourglass fermions on the (010) surface of crystalline KHgSb, whereas the (001) surface has no boundary state, in agreement with first-principles calculations. Our study will stimulate further research activities of topological properties of nonsymmorphic materials.
WOS关键词	SEMIMETAL
语种	英语
WOS记录号	WOS:000401955300019
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28649]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Ma, JZ,Yi, CJ,Lv, BQ,et al. Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb[J]. SCIENCE ADVANCES,2017,3(5):-.
APA	Ma, JZ.,Yi, CJ.,Lv, BQ.,Wang, ZJ.,Nie, SM.,...&Ding, H.(2017).Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb.SCIENCE ADVANCES,3(5),-.
MLA	Ma, JZ,et al."Experimental evidence of hourglass fermion in the candidate nonsymmorphic topological insulator KHgSb".SCIENCE ADVANCES 3.5(2017):-.