Thermal conductivity of twisted bilayer graphene

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	Thermal conductivity of twisted bilayer graphene
	Li, Hongyang ; Ying, Hao ; Chen, Xiangping ; Nika, Denis ; Cocemasov, Alexandr I. ; Cai, Weiwei ; Balandin, Alexander A. ; Chen, Shanshan ; Cai WW(蔡伟伟) ; Chen SS(陈珊珊)
刊名	http://dx.doi.org/10.1039/c4nr04455j
	2014
关键词	Graphene Phonons
英文摘要	We have investigated experimentally the thermal conductivity of suspended twisted bilayer graphene. The measurements were performed using an optothermal Raman technique. It was found that the thermal conductivity of twisted bilayer graphene is lower than that of monolayer graphene and the reference, Bernal stacked bilayer graphene in the entire temperature range examined (～300-700 K). This finding indicates that the heat carriers-phonons-in twisted bilayer graphene do not behave in the same manner as that observed in individual graphene layers. The decrease in the thermal conductivity found in twisted bilayer graphene was explained by the modification of the Brillouin zone due to plane rotation and the emergence of numerous folded phonon branches that enhance the phonon Umklapp and normal scattering. The results obtained are important for understanding thermal transport in two-dimensional systems. This journal is
语种	英语
出版者	Royal Society of Chemistry
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92202]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Li, Hongyang,Ying, Hao,Chen, Xiangping,et al. Thermal conductivity of twisted bilayer graphene[J]. http://dx.doi.org/10.1039/c4nr04455j,2014.
APA	Li, Hongyang.,Ying, Hao.,Chen, Xiangping.,Nika, Denis.,Cocemasov, Alexandr I..,...&陈珊珊.(2014).Thermal conductivity of twisted bilayer graphene.http://dx.doi.org/10.1039/c4nr04455j.
MLA	Li, Hongyang,et al."Thermal conductivity of twisted bilayer graphene".http://dx.doi.org/10.1039/c4nr04455j (2014).