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Applied Physics Letters / Volume 96 / Issue 26 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 263113 (2010); http://dx.doi.org/10.1063/1.3458831 (3 pages)

Phonon wave-packet interference and phonon tunneling based energy transport across nanostructured thin films

Z. T. Tian1, B. E. White, Jr.2, and Y. Sun3

1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2Department of Physics and the Materials Science Program, Binghamton University, Binghamton, New York 13902, USA
3Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19104, USA

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(Received 5 April 2010; accepted 8 June 2010; published online 1 July 2010)

The molecular dynamics based phonon wave-packet technique is used to study phonon transport across mass-mismatched fcc thin films. Transport behavior of normally incident longitudinal acoustic phonon wave packets with wave vectors ranging in magnitude from 2% to 50% of the 〈100〉 first Brillouin zone boundary is examined as a function of thin film thickness when the phonon mean free path exceeds film thickness. The results indicate that for thin film to bulk solid mass ratios up to a factor of 6, the transmission of energy through the thin film can be well described by treating the thin film as a bulk solid.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

Brillouin zones, molecular dynamics method, nanostructured materials, phonons, thin films

PACS

  • 63.22.-m

    Phonons or vibrational states in low-dimensional structures and nanoscale materials

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3458831

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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