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题名: From helical state to chiral state in ferromagnetic bilayer graphene
作者: Xu, L;  Zhou, Y;  Zhang, J
刊名: SOLID STATE COMMUNICATIONS
出版日期: 2015
卷号: 212, 期号:0, 页码:41-45
关键词: Bilayer graphene ;  Electronic band structure ;  Quantum Hall effect
学科分类: Physics
DOI: http://dx.doi.org/10.1016/j.ssc.2015.04.006
通讯作者: Xu, L (reprint author), Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China.
文章类型: Article
英文摘要: We explore topological phases in biased ferromagnetic bilayer graphene, formed by bilayer graphene subjected to an external ferromagnetic exchange field, under a magnetic field. The most likely way to obtain a variety of distinct broken symmetry topological phases is proposed by means of ferromagnetic exchange field. Both spin-filtered quantum Hall and quantum spin Hall (QSH) phases are found. Edge modes in this QSH phase carry charge, spin and valley currents. When both time reversal and inversion symmetries are broken, the QSH phase remains robust against weak disorder. Moreover, topological phase transition from helical phase to chiral phase can be driven by simply tuning bias voltage or Fermi energy. A few possible experimental realizations are also discussed. (C) 2015 Published by Elsevier Ltd.
类目[WOS]: Physics, Condensed Matter
关键词[WOS]: ELECTRONIC-PROPERTIES ;  DIRAC FERMIONS ;  BERRYS PHASE ;  LATTICE ;  FIELD
收录类别: SCI
项目资助者: NSFC [11404276, 11265015, 11347207] ;  Xinjiang University [B5130112] ;  NSF of the Xinjiang uygur [2014211A003]
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/20988
Appears in Collections:理论物理所2015年知识产出_期刊论文

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Recommended Citation:
Xu, L,Zhou, Y,Zhang, J. From helical state to chiral state in ferromagnetic bilayer graphene[J]. SOLID STATE COMMUNICATIONS,2015,212(0):41-45.
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