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; Yaji, K; Kuroda, K; Shin, S; Weng, HM; Bernevig, BA; Shi, Y; Qian, T; Ding, H
2017
发表期刊SCIENCE ADVANCES
ISSN2375-2548
卷号3期号:5页码:-
文章类型期刊论文
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.
关键词Semimetal
DOI10.1126/sciadv.1602415
关键词[WOS]SEMIMETAL
收录类别SCI
语种英语
WOS记录号WOS:000401955300019
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28649
专题中科院上海应用物理研究所2011-2018年
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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):-.
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