Thermal conductivity of twisted bilayer graphene

被引：144

作者：

Li, Hongyang ^{[1
,2
]}

Ying, Hao ^{[1
,2
]}

Chen, Xiangping ^{[1
,2
]}

Nika, Denis L. ^{[3
,4
,5
]}

Cocemasov, Alexandr I. ^{[5
]}

Cai, Weiwei ^{[1
,2
]}

Balandin, Alexander A. ^{[3
,4
]}

Chen, Shanshan ^{[1
,2
]}

机构：

[1] Xiamen Univ, Dept Phys, Lab Nanoscale Condense Matter Phys, Xiamen 361005, Peoples R China

[2] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China

[3] Univ Calif Riverside, Dept Elect Engn, Nanodevice Lab, Riverside, CA 92521 USA

[4] Univ Calif Riverside, Mat Sci & Engn Program, Riverside, CA 92521 USA

[5] Moldova State Univ, Dept Phys & Engn, E Pokatilov Lab Phys & Engn Nanomat, MD-2009 Kishinev, Moldova

来源：

NANOSCALE | 2014年 / 6卷 / 22期

基金：

美国国家科学基金会;

关键词：

SINGLE-LAYER GRAPHENE; MANAGEMENT; TRANSPORT; FILMS;

D O I：

10.1039/c4nr04455j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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 (similar to 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.

引用

页码：13402 / 13408

页数：7

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