中国物理B ›› 2018, Vol. 27 ›› Issue (3): 34402-034402.doi: 10.1088/1674-1056/27/3/034402

所属专题: TOPICAL REVIEW — Thermal and thermoelectric properties of nano materials

• TOPIC REVIEW—Thermal and thermoelectric properties of nano materials • 上一篇    下一篇

Thermal properties of transition-metal dichalcogenide

Xiangjun Liu(刘向军), Yong-Wei Zhang(张永伟)   

  1. Institute of High Performance Computing, A*STAR, Singapore 138632, Singapore
  • 收稿日期:2017-10-30 修回日期:2018-01-26 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: Xiangjun Liu E-mail:liux@ihpc.a-star.edu.sg

Thermal properties of transition-metal dichalcogenide

Xiangjun Liu(刘向军), Yong-Wei Zhang(张永伟)   

  1. Institute of High Performance Computing, A*STAR, Singapore 138632, Singapore
  • Received:2017-10-30 Revised:2018-01-26 Online:2018-03-05 Published:2018-03-05
  • Contact: Xiangjun Liu E-mail:liux@ihpc.a-star.edu.sg

摘要: Beyond graphene, the layered transition metal dichalcogenides (TMDs) have gained considerable attention due to their unique properties. Herein, we review the lattice dynamic and thermal properties of monolayer TMDs, including their phonon dispersion, relaxation time, mean free path (MFP), and thermal conductivities. In particular, the experimental and theoretical studies reveal that the TMDs have relatively low thermal conductivities due to the short phonon group velocity and MFP, which poses a significant challenge for efficient thermal management of TMDs-based devices. Importantly, recent studies have shown that this issue could be largely addressed by connecting TMDs and other materials (such as metal electrode and graphene) with chemical bonds, and a relatively high interfacial thermal conductance (ITC) could be achieved at the covalent bonded interface. The ITC of MoS2/Au interface with chemical edge contact is more than 10 times higher than that with physical side contact. In this article, we review recent advances in the study of TMD-related ITC. The effects of temperature, interfacial vacancy, contact orientation, and phonon modes on the edge-contacted interface are briefly discussed.

关键词: transition metal dichalcogenide, MoS2, thermal conductivity, interfacial thermal conductance

Abstract: Beyond graphene, the layered transition metal dichalcogenides (TMDs) have gained considerable attention due to their unique properties. Herein, we review the lattice dynamic and thermal properties of monolayer TMDs, including their phonon dispersion, relaxation time, mean free path (MFP), and thermal conductivities. In particular, the experimental and theoretical studies reveal that the TMDs have relatively low thermal conductivities due to the short phonon group velocity and MFP, which poses a significant challenge for efficient thermal management of TMDs-based devices. Importantly, recent studies have shown that this issue could be largely addressed by connecting TMDs and other materials (such as metal electrode and graphene) with chemical bonds, and a relatively high interfacial thermal conductance (ITC) could be achieved at the covalent bonded interface. The ITC of MoS2/Au interface with chemical edge contact is more than 10 times higher than that with physical side contact. In this article, we review recent advances in the study of TMD-related ITC. The effects of temperature, interfacial vacancy, contact orientation, and phonon modes on the edge-contacted interface are briefly discussed.

Key words: transition metal dichalcogenide, MoS2, thermal conductivity, interfacial thermal conductance

中图分类号:  (Heat conduction)

  • 44.10.+i
65.80.-g (Thermal properties of small particles, nanocrystals, nanotubes, and other related systems) 63.22.-m (Phonons or vibrational states in low-dimensional structures and nanoscale materials) 73.43.-f (Quantum Hall effects)