Manipulating thermal conductivity through substrate coupling

Zhi-Xin Guo, Dier Zhang, and Xin-Gao Gong
Phys. Rev. B 84, 075470 – Published 12 August 2011

Abstract

We report an approach to the thermal conductivity manipulation-substrate coupling. Generally, the phonon scattering with substrates can decrease the thermal conductivity, as observed in recent experiments. However, we find that at certain regions the coupling to substrates can increase the thermal conductivity due to a reduction of anharmonic phonon scattering induced by shift of the phonon band to the low wave vector. In this way, the thermal conductivity can be efficiently manipulated via coupling to different substrates, without changing or destroying the material structures. This idea is demonstrated by calculating the thermal conductivity of modified double-walled carbon nanotubes and also by the ice nanotubes coupled within carbon nanotubes.

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  • Received 23 August 2010

DOI:https://doi.org/10.1103/PhysRevB.84.075470

©2011 American Physical Society

Authors & Affiliations

Zhi-Xin Guo, Dier Zhang, and Xin-Gao Gong*

  • MOE Key Laboratory for Computational Physics and Surface Physics Laboratory (National Key), Fudan University, Shanghai 200433, China

  • *xggong@fudan.edu.cn

See Also

Effect of substrate modes on thermal transport in supported graphene

Zhun-Yong Ong and Eric Pop
Phys. Rev. B 84, 075471 (2011)

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Vol. 84, Iss. 7 — 15 August 2011

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