Phonon heat conduction in corrugated silicon nanowires below the Casimir limit

被引：63
作者：
Blanc, Christophe [1 ]
Rajabpour, Ali [2 ]
Volz, Sebastian [3 ]
Fournier, Thierry [1 ]
Bourgeois, Olivier [1 ]
机构：
[1] CNRS UJF, Inst NEEL, F-38042 Grenoble 9, France
[2] Imam Khomeini Int Univ, Dept Mech Engn, Qazvin 3414916818, Iran
[3] Ecole Cent Paris, Lab Energet Mol & Macroscop, F-92295 Chatenay Malabry, France
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 04期
关键词：
THERMAL-CONDUCTIVITY; TRANSPORT; SCATTERING; NANOSCALE;
D O I：
10.1063/1.4816590
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The thermal conductance of straight and corrugated monocrystalline silicon nanowires has been measured between 0.3 K and 5 K. It is demonstrated that the corrugation strongly reduces the thermal transport by reducing the mean free path of the phonons. The experimental averaged mean free path is remarkably smaller than the smaller diameter of the nanowire, evidencing a phonon thermal transport reduced below the Casimir limit. Monte Carlo simulations highlight that this effect can be attributed to significant multiple scattering of ballistic phonons occurring on the corrugated surfaces. This result suggests an original approach to transforming a monocrystalline material into a phonon glass. (C) 2013 AIP Publishing LLC.
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页数：5
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