Surface morphology and strain coupling effects on phonon transport in silicon nanowires

2016 ◽  
Vol 3 (8) ◽  
pp. 2759-2765 ◽  
Author(s):  
Xiangjun Liu ◽  
Gang Zhang ◽  
Qing-Xiang Pei ◽  
Yong-Wei Zhang
Keyword(s):  
Surface Morphology ◽  
Silicon Nanowires ◽  
Phonon Transport ◽  
Coupling Effects ◽  
Strain Coupling

Control of surface morphology and crystal structure of silicon nanowires and their coherent phonon transport characteristics

2014 ◽  
Vol 64 ◽  
pp. 62-71 ◽  
Author(s):  
Seung-Yong Lee ◽  
Gil-Sung Kim ◽  
Jongwoo Lim ◽  
Seungwoo Han ◽  
Baowen Li ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Surface Morphology ◽  
Silicon Nanowires ◽  
Phonon Transport ◽  
Coherent Phonon

Length Scale of Diffusive Phonon Transport in Suspended Thin Silicon Nanowires

Nano Letters ◽  
2017 ◽  
Vol 17 (1) ◽  
pp. 276-283 ◽  
Author(s):  
Shyamprasad N. Raja ◽  
Reto Rhyner ◽  
Kantawong Vuttivorakulchai ◽  
Mathieu Luisier ◽  
Dimos Poulikakos
Keyword(s):  
Silicon Nanowires ◽  
Phonon Transport ◽  
Length Scale ◽  
Thin Silicon

Enormous suppression of phonon transport in silicon nanowires with five-fold twin boundary

2018 ◽  
Vol 6 (38) ◽  
pp. 18533-18542 ◽  
Author(s):  
Yufei Gao ◽  
Yanguang Zhou ◽  
Ming Hu
Keyword(s):  
Twin Boundary ◽  
Silicon Nanowires ◽  
Phonon Transport ◽  
Boundary Scattering

The five-fold twin boundary not only leads to much more intense boundary scattering, but also results in vibrational hybridization.

Micro- and Nanoscale Phonon Heat Transport in Silicon

Volume 4 ◽  
2004 ◽  
Author(s):  
Y. Ju
Keyword(s):  
Thermal Conductivity ◽  
Silicon Nanowires ◽  
Phonon Dispersion ◽  
Transport Model ◽  
Phonon Transport ◽  
Conductivity Data ◽  
Phonon Modes ◽  
Conductivity Model ◽  
Thermal Conductivity Data ◽  
Thermal Conductivity Model

Micro- and nanoscale energy transport in semiconductors is one of the critical research areas for emerging nano-electronics. Key features of phonon dispersion curves are re-examined, which motivates the use of phonon density of states obtained from ab initio calculations as a basis for constructing a semi-phenomenological thermal conductivity model. Thermal conductivity data on silicon nanowires are analyzed to identify dominant phonon modes. The consistency of the present thermal conductivity model is examined by comparing its prediction with the thermal conductivity data from bulk germanium samples with controlled amount of point defects. The thermal conductivity modeling study provides input parameters for a two-fluid phonon transport model for silicon and related semiconductors, which can play an important role in computer aided design of nanoelectronic devices and simulation of ultra-fast phenomena.

Curvature Effect on the Thermal Conductivity of Nanowires

2008 ◽  
Author(s):  
Liang-Chun Liu ◽  
Mei-Jiau Huang ◽  
Ronggui Yang
Keyword(s):  
Thermal Conductivity ◽  
Monte Carlo ◽  
Effective Thermal Conductivity ◽  
Silicon Nanowires ◽  
Phonon Transport ◽  
Curvature Effect ◽  
Transport Efficiency ◽  
Directional Preference ◽  
Monte Carlo Simulator ◽  
Thermal Conductivities

Directional preference of the ballistic phonon transport plays an important role in the effective thermal conductivity of nanostructures. Curved nanowires can have very different thermal conductivities from straight ones. In this work, a Monte-Carlo simulator is developed and used to investigate the curvature effect on the phonon transport in silicon nanowires. The results show that the curvature of geometry does not alter the phonon transport efficiency in large wires but decreases the effective thermal conductivity in their nano-sized counterparts.

Analysis of phonon transport in silicon nanowires including optical phonons

2013 ◽  
Vol 63 (5) ◽  
pp. 1007-1013 ◽  
Author(s):  
Jae Sik Jin ◽  
Bong Jae Lee ◽  
Hyun Jin Lee
Keyword(s):  
Silicon Nanowires ◽  
Phonon Transport ◽  
Optical Phonons
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