Layer and size dependence of thermal conductivity in multilayer graphene nanoribbons |
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| Authors: | Hai-Yuan CaoZhi-Xin Guo Hongjun XiangXin-Gao Gong |
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| Institution: | a Key Laboratory for Computational Physical Sciences (MOE) and Surface Physics Laboratory, Fudan University, Shanghai 200433, China
b Department of Physics, Xiangtan University, Xiangtan 411105, China |
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| Abstract: | Using nonequilibrium molecular dynamics method (NEMD), we have found that the thermal conductivity of multilayer graphene nanoribbons monotonously decreases with the increase of the number of layers which can be attributed to the phonon resonance effect of out-of-plane phonon modes. The reduction of thermal conductivity is proportional to the layer size, which is caused by the increase of phonon resonance. The results clearly show the dimensional evolution of thermal conductivity from quasi-one dimension to higher dimensions in graphene nanoribbons. |
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| Keywords: | Thermal conductivity Multilayer graphene nanoribbon Nonequilibrium molecular dynamics Size effect Phonon coupling |
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