Tunable Thermal Transport and Thermal Rectification in Strained Graphene Nanoribbons

Details Tunable Thermal Transport and Thermal Rectification in Strained Graphene Nanoribbons Tunable Thermal Transport and Thermal Rectification in Strained Graphene Nanoribbons

2010-11-12

arxiv.org/abs/1011.3033v2

Physics

Condensed Matter

Materials Science

Scientific paper

Using molecular dynamics(MD) simulations and phonon dispersion calculations, we find that the thermal conductivity of zigzag graphene nanoribbons (GNRs) shows a weak dependence on moderate tensile strains, while that of armchair GNRs decreases significantly, a feature that could be promising for strain induced thermal device applications. We observe significant thermal rectification (over 70%) in a rectangular armchair GNR by applying a transverse force asymmetrically. The heat flux is larger from the less stressed region to the more stressed region. The findings in this work can potentially enable real-time tuning of the thermal rectification by a mechanical force in nanostructures.

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