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Necessary conditions for thermal rectification and negative differential thermal conductance in graphene nanoribbons

Published online by Cambridge University Press:  24 November 2011

Yan Wang  and
Xiulin Ruan
Yan Wang
Affiliation:
School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA
Xiulin Ruan
Affiliation:
School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA
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Abstract

We have studied negative differential thermal conductance (NDTC) and thermal rectification (TR) in graphene nanoribbons (GNRs) using nonequilibrium molecular dynamics simulations. Strong ballistic transport regime and sufficient temperature gradient are found to be necessary conditions for the onset of both NDTC and TR in GNRs, while the latter also requires asymmetry in structure. Preferred direction of heat transport is also discussed for TR.

Keywords

nanoscalenanostructurethermal conductivity
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1347: Symposium BB – Nanoscale Heat Transport—From Fundamentals to Devices , 2011 , mrss11-1347-bb09-16
Copyright
Copyright © Materials Research Society 2011

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