Antiferromagnetic and topological states in silicene: A mean field study

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	Antiferromagnetic and topological states in silicene: A mean field study
	Liu F(刘峰); Liu CC; Yao YG
刊名	CHINESE PHYSICS B
	2015-08
通讯作者邮箱	ygyao@bit.edu.cn
卷号	24 期号:8 页码:87503
关键词	spin-polarized quantum anomalous Hall state silicene antiferromagnetic state
ISSN号	1674-1056
通讯作者	Yao, YG (reprint author), Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China.
产权排序	[Liu Feng] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Liu Feng; Liu Cheng-Cheng; Yao Yu-Gui] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China
中文摘要	It has been widely accepted that silicene is a topological insulator, and its gap closes first and then opens again with increasing electric field, which indicates a topological phase transition from the quantum spin Hall state to the band insulator state. However, due to the relatively large atomic spacing of silicene, which reduces the bandwidth, the electron-electron interaction in this system is considerably strong and cannot be ignored. The Hubbard interaction, intrinsic spin orbital coupling (SOC), and electric field are taken into consideration in our tight-binding model, with which the phase diagram of silicene is carefully investigated on the mean field level. We have found that when the magnitudes of the two mass terms produced by the Hubbard interaction and electric potential are close to each other, the intrinsic SOC flips the sign of the mass term at either K or K' for one spin and leads to the emergence of the spin-polarized quantum anomalous Hall state.
分类号	二类/Q2
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	BILAYER GRAPHENE ; HONEYCOMB LATTICE ; TRANSITION
收录类别	SCI ; EI ; CSCD
原文出处	http://dx.doi.org/10.1088/1674-1056/24/8/087503
语种	英语
WOS记录号	WOS:000361906000080
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58410]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Liu F,Liu CC,Yao YG. Antiferromagnetic and topological states in silicene: A mean field study[J]. CHINESE PHYSICS B,2015,24(8):87503.
APA	Liu F,Liu CC,&Yao YG.(2015).Antiferromagnetic and topological states in silicene: A mean field study.CHINESE PHYSICS B,24(8),87503.
MLA	Liu F,et al."Antiferromagnetic and topological states in silicene: A mean field study".CHINESE PHYSICS B 24.8(2015):87503.