Phonon transmission and thermal conductance across graphene/Cu interface

被引：52
|
作者：
Chen, Liang [1 ]
Huang, Zhen [2 ]
Kumar, Satish [1 ]
机构：
[1] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA
[2] Int Business Machine, Austin, TX 78758 USA
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 12期
基金：
美国国家科学基金会;
关键词：
MONOLAYER GRAPHITE; DISPERSION; INTERCALATION; TRANSPORT; SURFACES; NI(111);
D O I：
10.1063/1.4821439
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate phonon transmission and thermal boundary conductance (TBC) across graphene/Cu interface using density functional theory and atomistic Green's function method. The analysis of phonon dispersions and density of states of single layer graphene (SLG) shows that even weak SLG/Cu interaction can soften the transverse optical and longitudinal optical modes and suppress low frequency out-of-plane acoustic (ZA) modes. Our calculations predict that a small stretching of the SLG lattice (similar to 1.6%) significantly enhances the SLG/Cu interaction which is reflected in larger band-gap for ZA/ZO phonon mode and a remarkable increase in TBC (similar to 59%). (C) 2013 AIP Publishing LLC.
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页数：4
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