The effect of defects on negative differential thermal resistance in symmetric graphene nanoribbons

The effect of defects on negative differential thermal resistance in symmetric graphene nanoribbons
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缺陷对对称石墨烯纳米带负微分热阻的影响

DOI:
10.1063/1.4861472
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发表时间:
2014-01
影响因子:
4
通讯作者:
Zhong, Wei-Rong
Zhong, Wei-Rong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shao, Zhi-Gang;Ai, Bao-Quan;Zhong, Wei-Rong

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采用非平衡态分子动力学方法研究了缺陷对对称石墨烯纳米带负微分热阻的影响。值得注意的是,它被发现,NDTR将消失的缺陷数量的增加。此外,当温度差较大时,具有缺陷的GNR的热流大于原始GNR的热流。利用声子谱失配理论对实验结果进行了定性解释。这一工作对基于GNRs的热纳米器件的设计具有一定的指导意义。
Effect of defects on negative differential thermal resistance (NDTR) is investigated using non-equilibrium molecular dynamics method for the symmetric graphene nanoribbons (GNRs) with defects. Remarkably, it is found that NDTR will disappear as the number of defects increases. In addition, heat current of GNRs with defects is larger than that of the pristine GNRs when the temperature difference is larger. The results are explained qualitatively utilizing the theory of phonon spectra mismatch. The work may be useful in designing thermal-nano devices on the basis of GNRs.
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