Abstract
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 effects may be useful in nanoscale thermal managements and thermal signal processing utilizing GNRs. (C) 2011 American Institute of Physics. [doi:10.1063/1.3630026]
Keywords
MOLECULAR-DYNAMICS METHODS; CONDUCTIVITY
DOI
10.1063/1.3630026
Citation
Applied Physics Letters: Volume 99, Issue 11
Date of this Version
9-12-2011
Recommended Citation
Hu, Jiuning; Wang, Yan; Vallabhaneni, Ajit; Ruan, Xiulin; and Chen, Yong P., "Nonlinear thermal transport and negative differential thermal conductance in graphene nanoribbons" (2011). Birck and NCN Publications. Paper 952.
http://dx.doi.org/10.1063/1.3630026
Comments
Copyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters: Volume 99, Issue 11 and may be found at http://dx.doi.org/10.1063/1.3630026. The following article has been submitted to/accepted by Applied Physics Letters. Copyright (2011) Jiuning Hu, Yan Wang, Ajit Vallabhaneni, Xiulin Ruan, and Yong P. Chen. This article is distributed under a Creative Commons Attribution 3.0 Unported License.