中国物理B ›› 2017, Vol. 26 ›› Issue (11): 116503-116503.doi: 10.1088/1674-1056/26/11/116503

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Thermal transport in twisted few-layer graphene

Min-Hua Wang(王敏华), Yue-E Xie(谢月娥), Yuan-Ping Chen(陈元平)   

  1. Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan 411105, China
  • 收稿日期:2017-05-07 修回日期:2017-07-23 出版日期:2017-11-05 发布日期:2017-11-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51376005 and 11474243).

Thermal transport in twisted few-layer graphene

Min-Hua Wang(王敏华), Yue-E Xie(谢月娥), Yuan-Ping Chen(陈元平)   

  1. Laboratory for Quantum Engineering and Micro-Nano Energy Technology, Xiangtan University, Xiangtan 411105, China
  • Received:2017-05-07 Revised:2017-07-23 Online:2017-11-05 Published:2017-11-05
  • Contact: Yuan-Ping Chen E-mail:chenyp@xtu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51376005 and 11474243).

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摘要：

Twisted graphene possesses unique electronic properties and applications, which have been studied extensively. Recently, the phonon properties of twisted graphene have received a great deal of attention. To the best of our knowledge, thermal transports in twisted graphene have been investigated little to date. Here, we study perpendicular and parallel transports in twisted few-layer graphene (T-FLG). It is found that perpendicular and parallel transports are both sensitive to the rotation angle θ between layers. When θ increases from 0° to 60°, perpendicular thermal conductivity κ⊥ first decreases and then increases, and the transition angle is θ=30°. For the parallel transport, the relation between thermal conductivity κ|| and θ is complicated, because intra-layer thermal transport is more sensitive to the edge of layer than their stacking forms. However, the dependence of interlayer scattering on θ is similar to that of κ⊥. In addition, the effect of layer number on the thermal transport is discussed. Our results may provide references for designing the devices of thermal insulation and thermal management based on graphene.

关键词: twisted graphene, thermal transport, rotation angle, thermal conductivity

Abstract:

Twisted graphene possesses unique electronic properties and applications, which have been studied extensively. Recently, the phonon properties of twisted graphene have received a great deal of attention. To the best of our knowledge, thermal transports in twisted graphene have been investigated little to date. Here, we study perpendicular and parallel transports in twisted few-layer graphene (T-FLG). It is found that perpendicular and parallel transports are both sensitive to the rotation angle θ between layers. When θ increases from 0° to 60°, perpendicular thermal conductivity κ⊥ first decreases and then increases, and the transition angle is θ=30°. For the parallel transport, the relation between thermal conductivity κ|| and θ is complicated, because intra-layer thermal transport is more sensitive to the edge of layer than their stacking forms. However, the dependence of interlayer scattering on θ is similar to that of κ⊥. In addition, the effect of layer number on the thermal transport is discussed. Our results may provide references for designing the devices of thermal insulation and thermal management based on graphene.

Key words: twisted graphene, thermal transport, rotation angle, thermal conductivity

中图分类号:  (Phonons in graphene)

  • 63.22.Rc
63.20.kg (Phonon-phonon interactions) 74.25.fc (Electric and thermal conductivity) 65.80.Ck (Thermal properties of graphene)