IMECH-IR  > 非线性力学国家重点实验室
Antiferromagnetic and topological states in silicene: A mean field study
Liu F(刘峰); Liu CC; Yao YG; Yao, YG (reprint author), Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China.
Source PublicationCHINESE PHYSICS B
2015-08
Volume24Issue:8Pages:87503
ISSN1674-1056
AbstractIt 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.
KeywordSpin-polarized Quantum Anomalous Hall State Silicene Antiferromagnetic State
DOI10.1088/1674-1056/24/8/087503
URL查看原文
Indexed BySCI ; EI ; CSCD
Language英语
WOS IDWOS:000361906000080
WOS KeywordBILAYER GRAPHENE ; HONEYCOMB LATTICE ; TRANSITION
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
Funding OrganizationProject supported by the National Key Basic Research Program of China (Grant Nos. 2014CB920903, 2013CB921903, 2011CBA00108, and 2012CB937500), the National Natural Science Foundation of China (Grant Nos. 11021262, 11172303, 11404022, 11225418, and 11174337), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20121101110046), the Excellent Young Scholars Research Fund of Beijing Institute of Technology (Grant No. 2014CX04028), and the Basic Research Funds of Beijing Institute of Technology (Grant No. 20141842001).
DepartmentLNM固体物理力学
Classification二类/Q2
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58410
Collection非线性力学国家重点实验室
Corresponding AuthorYao, YG (reprint author), Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China.
Recommended Citation
GB/T 7714
Liu F,Liu CC,Yao YG,et al. 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,&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.
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