Chern Semimetal and the Quantized Anomalous Hall Effect in HgCr2Se4

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	Chern Semimetal and the Quantized Anomalous Hall Effect in HgCr2Se4
	Xu, G ; Weng, HM ; Wang, ZJ ; Dai, X ; Fang, Z
刊名	PHYSICAL REVIEW LETTERS
	2011
卷号	107 期号:18
关键词	SEMICONDUCTOR HGCR2SE4 FERROMAGNETIC SPINELS MOMENTUM-SPACE MAGNETORESISTANCE CONDUCTANCE
ISSN号	0031-9007
通讯作者	Fang, Z: Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要	In 3D momentum space, a topological phase boundary separating the Chern insulating layers from normal insulating layers may exist, where the gap must be closed, resulting in a "Chern semimetal" state with topologically unavoidable band crossings at the Fermi level. This state is a condensed-matter realization of Weyl fermions in (3 + 1)D, and should exhibit remarkable features, such as magnetic monopoles and Fermi arcs. Here we predict, based on first principles calculations, that such a novel quantum state can be realized in a known ferromagnetic compound HgCr2Se4, with a single pair of Weyl fermions separated in momentum space. The quantum Hall effect without an external magnetic field can be achieved in its quantum-well structure.
收录类别	SCI
资助信息	NSF of China; 973 program of China [2007CB925000, 2011CBA00108]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/34724]
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	Xu, G,Weng, HM,Wang, ZJ,et al. Chern Semimetal and the Quantized Anomalous Hall Effect in HgCr2Se4[J]. PHYSICAL REVIEW LETTERS,2011,107(18).
APA	Xu, G,Weng, HM,Wang, ZJ,Dai, X,&Fang, Z.(2011).Chern Semimetal and the Quantized Anomalous Hall Effect in HgCr2Se4.PHYSICAL REVIEW LETTERS,107(18).
MLA	Xu, G,et al."Chern Semimetal and the Quantized Anomalous Hall Effect in HgCr2Se4".PHYSICAL REVIEW LETTERS 107.18(2011).