Ordered-current state of electrons in bilayer graphene

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	Ordered-current state of electrons in bilayer graphene
	Yan, XZ ; Ting, CS
刊名	PHYSICAL REVIEW B
	2013
卷号	88 期号:4
ISSN号	1098-0121
通讯作者	Yan, XZ (reprint author), Chinese Acad Sci, Inst Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	Based on the four-band continuum model, we study the ordered-current state (OCS) for electrons in bilayer graphene at the charge neutrality point. The present work resolves the puzzles that (a) the energy gap increases significantly with increasing the magnetic field B, (b) the energy gap can be closed by the external electric field of either polarization, and (c) the particle-hole spectrum is asymmetric in the presence of B, all these as observed by the experiment. We also present the prediction of the hysteresis energy gap behavior with varying B, which explains the existing experimental observation on the electric conductance at weak B. The large energy gap of the OCS is shown to originate from the disappearance of Landau levels of n = 0 and 1 states in conduction/valence band. By comparing with the existing models and the experiments, we conclude that the OCS is a possible ground state of electrons in bilayer graphene.
资助信息	National Basic Research 973 Program of China [2011CB932702, 2012CB932302]; NSFC [10834011]; Robert A. Welch Foundation [E-1146]
语种	英语
公开日期	2014-01-16
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57301]
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	Yan, XZ,Ting, CS. Ordered-current state of electrons in bilayer graphene[J]. PHYSICAL REVIEW B,2013,88(4).
APA	Yan, XZ,&Ting, CS.(2013).Ordered-current state of electrons in bilayer graphene.PHYSICAL REVIEW B,88(4).
MLA	Yan, XZ,et al."Ordered-current state of electrons in bilayer graphene".PHYSICAL REVIEW B 88.4(2013).