Reducing thermal conductivity of crystalline solids at high temperature using embedded nanostructures

Woochul Kim, Suzanne L. Singer, Arun Majumdar, Joshua M.O. Zide, Dmitri Klenov, Arthur C. Gossard, Susanne Stemmer

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Thermal conductivity of a crystalline solid at high temperature is dominated by the Umklapp process because the number of high frequency phonons increases with temperature. It is challenging to reduce the thermal conductivity of crystalline solids at high temperature although it is widely known that, by increasing the atomic defect concentration, thermal conductivity of crystalline solids can be reduced at low temperature. By increasing the concentration of ErAs nanoparticles in ln 0.53Ga 0.47As up to 6 atom %, we demonstrate a thermal conductivity reduction by almost a factor of 3 below that of ln 0.53Ga 0.47As at high temperature. A theoretical model suggests that the mean free path of the low frequency phonons is suppressed by increasing the ErAs nanoparticle concentration.

Original languageEnglish
Pages (from-to)2097-2099
Number of pages3
JournalNano letters
Volume8
Issue number7
DOIs
Publication statusPublished - 2008 Jul

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Kim, W., Singer, S. L., Majumdar, A., Zide, J. M. O., Klenov, D., Gossard, A. C., & Stemmer, S. (2008). Reducing thermal conductivity of crystalline solids at high temperature using embedded nanostructures. Nano letters, 8(7), 2097-2099. https://doi.org/10.1021/nl080189t