Investigation of size and electronic effects on Kapitza conductance with non-equilibrium molecular dynamics

被引：69

作者：

Jones, R. E. ^{[1
]}

Duda, J. C. ^{[2
]}

Zhou, X. W. ^{[1
]}

Kimmer, C. J. ^{[3
]}

Hopkins, P. E. ^{[2
]}

机构：

[1] Sandia Natl Labs, Dept Mech Mat, Livermore, CA 94550 USA

[2] Univ Virginia, Dept Mech & Aerosp Engn, Charlottesville, VA 22904 USA

[3] Indiana Univ SE, Sch Nat Sci, New Albany, IN 47150 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 18期

关键词：

TRANSPORT; INTERFACES; GAN;

D O I：

10.1063/1.4804677

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In nanosystems, the thermal resistance between materials typically dominates the overall resistance. While size effects on thermal conductivity are well documented, size effects on thermal boundary conductance have only been speculated. In response, we characterize the relationship between interfacial resistance and material dimension using molecular dynamics. We find that the interfacial resistance increases linearly with inverse system length but is insensitive to cross-sectional area. Also, from the temperature-dependence of interfacial resistance, we conclude that contributions of short-wavelength phonons dominate. Lastly, by coupling the molecular dynamics to a two-temperature model, we show that electron-mediated transport has little effect on thermal resistance. (C) 2013 AIP Publishing LLC.

引用

页数：5

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