Features of phonon transport in silicon rods and thin plates in the boundary scattering regime. The effect of phonon focusing at low temperatures

2013 ◽  
Vol 416 ◽  
pp. 81-87 ◽  
Author(s):  
I.I. Kuleyev ◽  
I.G. Kuleyev ◽  
S.M. Bakharev ◽  
A.V. Inyushkin
Keyword(s):  
Low Temperatures ◽  
Phonon Transport ◽  
Thin Plates ◽  
Boundary Scattering ◽  
Silicon Rods ◽  
Phonon Focusing

Phonon focusing and features of phonon transport in silicon nanofilms and nanowires at low temperatures

2014 ◽  
Vol 252 (2) ◽  
pp. 323-332 ◽  
Author(s):  
I. I. Kuleyev ◽  
I. G. Kuleyev ◽  
S. M. Bakharev
Keyword(s):  
Low Temperatures ◽  
Phonon Transport ◽  
Phonon Focusing

On the Boundary Scattering of Phonons

1973 ◽  
Vol 51 (2) ◽  
pp. 223-225 ◽  
Author(s):  
G. P. Srivastava ◽  
G. S. Verma
Keyword(s):  
Low Temperatures ◽  
Boundary Scattering ◽  
Variational Treatment

In this paper we have discussed the variational treatment of the boundary scattering of phonons. The procedure of Hamilton and Parrott for boundary scattering of phonons is modified; but still the method is shown to give Casimir's result at low temperatures.

Radiative ballistic phonon transport in silicon-nitride membranes at low temperatures

2005 ◽  
Vol 86 (25) ◽  
pp. 251903 ◽  
Author(s):  
H. F. C. Hoevers ◽  
M. L. Ridder ◽  
A. Germeau ◽  
M. P. Bruijn ◽  
P. A. J. de Korte ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Low Temperatures ◽  
Phonon Transport

From the Casimir Limit to Phononic Crystals: 20 Years of Phonon Transport Studies Using Silicon-on-Insulator Technology

2013 ◽  
Vol 135 (6) ◽  
Author(s):  
Amy M. Marconnet ◽  
Mehdi Asheghi ◽  
Kenneth E. Goodson
Keyword(s):  
Room Temperature ◽  
Crystalline Silicon ◽  
Phonon Dispersion ◽  
Single Crystal Silicon ◽  
Phonon Transport ◽  
Silicon On Insulator ◽  
Boundary Scattering ◽  
Porous Films ◽  
Crystal Silicon ◽  
20 Nm

Silicon-on-insulator (SOI) technology has sparked advances in semiconductor and MEMs manufacturing and revolutionized our ability to study phonon transport phenomena by providing single-crystal silicon layers with thickness down to a few tens of nanometers. These nearly perfect crystalline silicon layers are an ideal platform for studying ballistic phonon transport and the coupling of boundary scattering with other mechanisms, including impurities and periodic pores. Early studies showed clear evidence of the size effect on thermal conduction due to phonon boundary scattering in films down to 20 nm thick and provided the first compelling room temperature evidence for the Casimir limit at room temperature. More recent studies on ultrathin films and periodically porous thin films are exploring the possibility of phonon dispersion modifications in confined geometries and porous films.

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.

Atomistic Visualization of Ballistic Phonon Transport

2007 ◽  
Author(s):  
Neil Zuckerman ◽  
Jennifer R. Lukes
Keyword(s):  
Heat Transfer ◽  
High Frequency ◽  
Energy Transport ◽  
Imaging Techniques ◽  
Phonon Transport ◽  
Dynamics Simulation ◽  
Short Time Scale ◽  
Ballistic Phonons ◽  
Short Time ◽  
Phonon Focusing

Heat transfer in solid materials at short time scales, short length scales, and low temperatures is governed by the transport of ballistic phonons. In anisotropic crystals, the energy carried by these phonons is strongly channeled into well-defined directions in a phenomenon known as phonon focusing. Presented here is a new molecular dynamics simulation approach for visualizing acoustic phonon focusing in anisotropic crystals. An advantage of this approach over experimental phonon imaging techniques is that it allows examination of phonon propagation at selected modes and frequencies. The spatial, mode, and frequency dependence of ballistic energy transport gained with this approach will be useful for understanding heat transfer issues in high frequency electronics and short time scale laser-material interactions.

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