Observation of three-component fermions in the topological semimetal molybdenum phosphide
Lv, BQ; Feng, ZL; Xu, QN; Gao, X; Ma, JZ; Kong, LY; Richard, P; Huang, YB; Strocov, VN; Fang, C; Weng, HM; Shi, YG; Qian, T; Ding, H
2017
发表期刊NATURE
ISSN0028-0836
卷号546期号:7660页码:627-+
文章类型期刊论文
摘要In quantum field theory, Lorentz invariance leads to three types of fermion-Dirac, Weyl and Majorana. Although the existence of Weyl and Majorana fermions as elementary particles in high-energy physics is debated, all three types of fermion have been proposed to exist as low-energy, long-wavelength quasiparticle excitations in condensed-matter systems(1-12). The existence of Dirac and Weyl fermions in condensed-matter systems has been confirmed experimentally(13-18), and that of Majorana fermions is supported by various experiments(19,20). However, in condensed-matter systems, fermions in crystals are constrained by the symmetries of the 230 crystal space groups rather than by Lorentz invariance, giving rise to the possibility of finding other types of fermionic excitation that have no counterparts in high-energy physics(21-29). Here we use angle-resolved photoemission spectroscopy to demonstrate the existence of a triply degenerate point in the electronic structure of crystalline molybdenum phosphide. Quasiparticle excitations near a triply degenerate point are three-component fermions, beyond the conventional Dirac-Weyl-Majorana classification, which attributes Dirac and Weyl fermions to four-and two-fold degenerate points, respectively. We also observe pairs of Weyl points in the bulk electronic structure of the crystal that coexist with the three-component fermions. This material thus represents a platform for studying the interplay between different types of fermions. Our experimental discovery opens up a way of exploring the new physics of unconventional fermions in condensed-matter systems.
关键词Majorana Fermions Dirac Semimetal Taas Superconductor Discovery Surface Arcs
DOI10.1038/nature22390
关键词[WOS]MAJORANA FERMIONS ; DIRAC SEMIMETAL ; TAAS ; SUPERCONDUCTOR ; DISCOVERY ; SURFACE ; ARCS
收录类别SCI
语种英语
WOS记录号WOS:000404332000042
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/28758
专题中科院上海应用物理研究所2011-2018年
推荐引用方式
GB/T 7714
Lv, BQ,Feng, ZL,Xu, QN,et al. Observation of three-component fermions in the topological semimetal molybdenum phosphide[J]. NATURE,2017,546(7660):627-+.
APA Lv, BQ.,Feng, ZL.,Xu, QN.,Gao, X.,Ma, JZ.,...&Ding, H.(2017).Observation of three-component fermions in the topological semimetal molybdenum phosphide.NATURE,546(7660),627-+.
MLA Lv, BQ,et al."Observation of three-component fermions in the topological semimetal molybdenum phosphide".NATURE 546.7660(2017):627-+.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Observation of three(2538KB)期刊论文作者接受稿开放获取CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Lv, BQ]的文章
[Feng, ZL]的文章
[Xu, QN]的文章
百度学术
百度学术中相似的文章
[Lv, BQ]的文章
[Feng, ZL]的文章
[Xu, QN]的文章
必应学术
必应学术中相似的文章
[Lv, BQ]的文章
[Feng, ZL]的文章
[Xu, QN]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。