Ballistic thermal conductance in graphene nanoribbon with double-cavity structure

被引：33

作者：

Peng, Xiao-Fang ^{[1
]}

Wang, Xin-Jun ^{[1
]}

Gong, Zhi-Qiang ^{[1
]}

Chen, Ke-Qiu ^{[2
]}

机构：

[1] Cent S Univ Forestry & Technol, Inst Math & Phys, Changsha 410004, Hunan, Peoples R China

[2] Hunan Univ, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 23期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

QUANTUM; TRANSPORT;

D O I：

10.1063/1.3666221

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigate phonon transport and thermal conductance in a Graphene Nanoribbon modulated with a double-cavity quantum structure at low temperatures. Two methods are compared: the force-constant and elastic wave continuum models. Calculations show that both the models show the similar thermal conductance property at low temperatures despite the excited theory of the discrete phonon modes in quantum structure being not the same. However, in the higher temperature region, the thermal conductance in the force-constant model is bigger than that in the elastic wave continuum model. The difference originates from the inequable cutoff frequencies of the phonon modes. A brief analysis of these results is given. (C) 2011 American Institute of Physics. [doi:10.1063/1.3666221]

引用

页数：3

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