From helical state to chiral state in ferromagnetic bilayer graphene

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	From helical state to chiral state in ferromagnetic bilayer graphene
	Xu, L; Zhou, Y; Zhang, J
刊名	SOLID STATE COMMUNICATIONS
	2015
卷号	212 期号:0 页码:41-45
关键词	Bilayer graphene Electronic band structure Quantum Hall effect
通讯作者	Xu, L (reprint author), Xinjiang Univ, Sch Phys Sci & Technol, Urumqi 830046, Peoples R China.
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.
学科主题	Physics
类目[WOS]	Physics, Condensed Matter
关键词[WOS]	ELECTRONIC-PROPERTIES ; DIRAC FERMIONS ; BERRYS PHASE ; LATTICE ; FIELD
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/20988]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	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.
APA	Xu, L,Zhou, Y,&Zhang, J.(2015).From helical state to chiral state in ferromagnetic bilayer graphene.SOLID STATE COMMUNICATIONS,212(0),41-45.
MLA	Xu, L,et al."From helical state to chiral state in ferromagnetic bilayer graphene".SOLID STATE COMMUNICATIONS 212.0(2015):41-45.