Nonlinear thermal transport and negative differential thermal conductance in graphene nanoribbons

Details Nonlinear thermal transport and negative differential thermal conductance in graphene nanoribbons Nonlinear thermal transport and negative differential thermal conductance in graphene nanoribbons

2011-04-06

arxiv.org/abs/1104.0989v2

Applied Physics Letters 99 ,113101 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1063/1.3630026

We employ classical molecular dynamics to study the nonlinear thermal transport in graphene nanoribbons (GNRs). For GNRs under large temperature biases beyond linear response regime, we have observed the onset of negative differential thermal conductance (NDTC). NDTC is tunable by varying the manner of applying the temperature biases. NDTC is reduced and eventually disappears when the length of the GNR increases. We have also observed NDTC in triangular GNRs, where NDTC exists only when the heat current is from the narrower to the wider end. These e?ects may be useful in nanoscale thermal managements and thermal signal processing utilizing GNRs.

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