Thermal Rectification In Asymmetric Graphene Ribbons

Details Thermal Rectification In Asymmetric Graphene Ribbons Thermal Rectification In Asymmetric Graphene Ribbons

2009-06-05

arxiv.org/abs/0906.1046v1

Physics

Condensed Matter

Materials Science

Scientific paper

In this paper, heat flux in graphene nano ribbons has been studied by using molecular dynamics simulations. It is found that the heat flux runs preferentially along the direction of decreasing width, which demonstrates significant thermal rectification effect in the asymmetric graphene ribbons. The dependence of rectification ratio on the vertex angle and the length are also discussed. Compared to the carbon nanotube based one-dimensional thermal rectifier, graphene nano ribbons have much higher rectification ratio even in large scale. Our results demonstrate that asymmetric graphene ribbon might be a promising structure for practical thermal (phononics) device.

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