Phonon wave-packet simulations of Ar/Kr interfaces

Author

Roberts, N.A. ; Walker, D.G.

Author_Institution

Dept. of Mech. Eng., Vanderbilt Univ., Nashville, TN, USA

fYear

2010

fDate

2-5 June 2010

Firstpage

1

Lastpage

5

Abstract

The frequency- and direction-dependence of transmission coefficients at interfaces was investigated theoretically. The interfaces are formed by having two Lennard-Jones (L-J) materials differing in mass and interatomic potential equally divided at the center of an FCC lattice system. A single frequency wave-packet is generated at one end of the system and allowed to propagate through the system until all interactions with the interface are complete. The transmission coefficient is then calculated by comparing the energy of the packet that is transmitted with the original wave-packet. Results show a difference in transmission when the wave-packet originates from opposite sides.

Keywords

Lennard-Jones potential; argon; interface phonons; krypton; Ar-Kr; Ar-Kr interfaces; Lennard-Jones materials; fcc lattice system; interatomic potential; phonon wave-packet simulations; single frequency wave-packet; transmission coefficients; Argon; Frequency; Lattices; Mechanical engineering; Phonons; Temperature control; Temperature dependence; Thermal conductivity; Thermal management; Thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), 2010 12th IEEE Intersociety Conference on

Conference_Location

Las Vegas, NV

ISSN

1087-9870

Print_ISBN

978-1-4244-5342-9

Electronic_ISBN

1087-9870

Type

conf

DOI

10.1109/ITHERM.2010.5501331

Filename

5501331