A stable three-dimensional topological Dirac semimetal Cd3As2

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	A stable three-dimensional topological Dirac semimetal Cd3As2
	Liu, ZK ; Jiang, J ; Zhou, B ; Wang, ZJ ; Zhang, Y ; Weng, HM ; Prabhakaran, D ; Mo, SK ; Peng, H ; Dudin, P ; Kim, T ; Hoesch, M ; Fang, Z ; Dai, X ; Shen, ZX ; Feng, DL ; Hussain, Z ; Chen, YL
刊名	NATURE MATERIALS
	2014
卷号	13 期号:7 页码:677
ISSN号	1476-1122
通讯作者	Chen, YL (reprint author), Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
中文摘要	Three-dimensional (3D) topological Dirac semimetals (TDSs) are a recently proposed state of quantum matter(1-6) that have attracted increasing attention in physics and materials science. A 3D TDS is not only a bulk analogue of graphene; it also exhibits non-trivial topology in its electronic structure that shares similarities with topological insulators. Moreover, a TDS can potentially be driven into other exotic phases (such as Weyl semimetals(1,7), axion insulators(1,4) and topological superconductors(8,9)), making it a unique parent compound for the study of these states and the phase transitions between them. Here, by performing angle-resolved photoemission spectroscopy, we directly observe a pair of 3D Dirac fermions in Cd3As2, proving that it is a model 3D TDS. Compared with other 3D TDSs, for example, beta-cristobalite BiO2 (ref. 3) and Na3Bi (refs 4,5), Cd3As2 is stable and has much higher Fermi velocities. Furthermore, by in situ doping we have been able to tune its Fermi energy, making it a flexible platform for exploring exotic physical phenomena.
资助信息	EPSRC (UK) [EP/K04074X/1]; DARPA (US) MESO project [N66001-11-1-4105]; Department of Energy, Office of Basic Energy Science [DE-AC02-76SF00515, DE-AC02-05CH11231]; NSF of China; National Basic Research Program of China; International Science and Technology Cooperation Program of China; National Basic Research Program of China [2012CB921402]; China Scholarship Council
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/59388]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Liu, ZK,Jiang, J,Zhou, B,et al. A stable three-dimensional topological Dirac semimetal Cd3As2[J]. NATURE MATERIALS,2014,13(7):677.
APA	Liu, ZK.,Jiang, J.,Zhou, B.,Wang, ZJ.,Zhang, Y.,...&Chen, YL.(2014).A stable three-dimensional topological Dirac semimetal Cd3As2.NATURE MATERIALS,13(7),677.
MLA	Liu, ZK,et al."A stable three-dimensional topological Dirac semimetal Cd3As2".NATURE MATERIALS 13.7(2014):677.