Intrinsic superconductivity in ABA-stacked trilayer graphene

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	Intrinsic superconductivity in ABA-stacked trilayer graphene
	Liu, HW ; Jiang, H ; Xie, XC
刊名	AIP ADVANCES
	2012
卷号	2 期号:4
ISSN号	2158-3226
通讯作者	Liu, HW: Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We study the phonon-mediated superconductivity in light doped ABA-stacked trilayer graphene system by means of two theoretical models. We find superconducting transition temperature T-C can be greatly enlarged by tuning the Fermi energy away from neutral point. Utilizing realistic parameters, we find T-c is approximately 1 K even under weak doping condition E-F = 0.1 eV. Specifically, we give out the analytical expression for superconductivity gap Delta and superconducting transition temperature T-c for negative-U Hubbard model. Further, we consider the thermal fluctuation and calculate the Berezinskii-Kosterlitz-Thouless critical temperature T-BKT. Besides, we consider a two-band BCS model in comparision with the negative-U Hubbard model. The results for both models are qualitatively consistent. Our study provides a promising possibility for realizing intrinsic superconductivity in multilayer graphene systems. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4773226]
收录类别	SCI
资助信息	NSF-China [10821403, 10974236, 11074174]; NBRPC [2012CB- 921300]; NSFC [91121004]; China Post-doctoral Science Foundation [20100480147, 201104030]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40221]
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	Liu, HW,Jiang, H,Xie, XC. Intrinsic superconductivity in ABA-stacked trilayer graphene[J]. AIP ADVANCES,2012,2(4).
APA	Liu, HW,Jiang, H,&Xie, XC.(2012).Intrinsic superconductivity in ABA-stacked trilayer graphene.AIP ADVANCES,2(4).
MLA	Liu, HW,et al."Intrinsic superconductivity in ABA-stacked trilayer graphene".AIP ADVANCES 2.4(2012).