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High thermal conductivity of a hydrogenated amorphous silicon film

Publication ,  Journal Article
Liu, X; Feldman, JL; Cahill, DG; Crandall, RS; Bernstein, N; Photiadis, DM; Mehl, MJ; Papaconstantopoulos, DA
Published in: Physical Review Letters
January 20, 2009

We measured the thermal conductivity κ of an 80μm thick hydrogenated amorphous silicon film prepared by hot-wire chemical-vapor deposition with the 3ω (80-300 K) and the time-domain thermoreflectance (300 K) methods. The κ is higher than any of the previous temperature dependent measurements and shows a strong phonon mean free path dependence. We also applied a Kubo based theory using a tight-binding method on three 1000 atom continuous random network models. The theory gives higher κ for more ordered models, but not high enough to explain our results, even after extrapolating to lower frequencies with a Boltzmann approach. Our results show that this material is more ordered than any amorphous silicon previously studied. © 2009 The American Physical Society.

Duke Scholars

Published In

Physical Review Letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 20, 2009

Volume

102

Issue

3

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

Citation

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Liu, X., Feldman, J. L., Cahill, D. G., Crandall, R. S., Bernstein, N., Photiadis, D. M., … Papaconstantopoulos, D. A. (2009). High thermal conductivity of a hydrogenated amorphous silicon film. Physical Review Letters, 102(3). https://doi.org/10.1103/PhysRevLett.102.035901
Liu, X., J. L. Feldman, D. G. Cahill, R. S. Crandall, N. Bernstein, D. M. Photiadis, M. J. Mehl, and D. A. Papaconstantopoulos. “High thermal conductivity of a hydrogenated amorphous silicon film.” Physical Review Letters 102, no. 3 (January 20, 2009). https://doi.org/10.1103/PhysRevLett.102.035901.
Liu X, Feldman JL, Cahill DG, Crandall RS, Bernstein N, Photiadis DM, et al. High thermal conductivity of a hydrogenated amorphous silicon film. Physical Review Letters. 2009 Jan 20;102(3).
Liu, X., et al. “High thermal conductivity of a hydrogenated amorphous silicon film.” Physical Review Letters, vol. 102, no. 3, Jan. 2009. Scopus, doi:10.1103/PhysRevLett.102.035901.
Liu X, Feldman JL, Cahill DG, Crandall RS, Bernstein N, Photiadis DM, Mehl MJ, Papaconstantopoulos DA. High thermal conductivity of a hydrogenated amorphous silicon film. Physical Review Letters. 2009 Jan 20;102(3).

Published In

Physical Review Letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

January 20, 2009

Volume

102

Issue

3

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences