Cited by 307Thermal properties of materialsGaN-based semiconductor devices and materialsThermal Expansion and Ionic Conductivity

Thermal Conductivity and Large Isotope Effect in GaN from First Principles

Lindsay, L., Broido, D. A., Reinecke, T. L.·2012·Physical Review Letters

Abstract

We present atomistic first principles results for the lattice thermal conductivity of GaN and compare them to those for GaP, GaAs, and GaSb. In GaN we find a large increase to the thermal conductivity with isotopic enrichment, ~65% at room temperature. We show that both the high thermal conductivity and its enhancement with isotopic enrichment in GaN arise from the weak coupling of heat-carrying acoustic phonons with optic phonons. This weak scattering results from stiff atomic bonds and the large Ga to N mass ratio, which give phonons high frequencies and also a pronounced energy gap between acoustic and optic phonons compared to other materials. Rigorous understanding of these features in GaN gives important insights into the interplay between intrinsic phonon-phonon scattering and isotopic scattering in a range of materials.

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Crossref · 10.1103/physrevlett.109.095901

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31 of 31 references verified0 citation errors · 0 not checkable

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  • Some debate exists on the importance of isotope scattering in gallium-based semiconductors, though authors agree that it is diminished at high temperatures.

    “Some debate exists on the importance of isotope scattering in gallium-based semiconductors, though authors agree that it is diminished at high temperatures31383940.”

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Authors
Lindsay, L., Broido, D. A., & Reinecke, T. L.
Affiliations
  • United States Naval Research Laboratory (US)
  • Boston College (US)
Venue
Physical Review Letters
Published
2012-08-28
Volume
109
Issue
9
Pages
095901-095901
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2093255979
Cited by
307
References
31
Citations by year
2026: 13 · 2025: 22 · 2024: 24 · 2023: 14 · 2022: 25 · 2021: 28 · 2020: 25 · 2019: 24 · 2018: 26 · 2017: 27 · 2016: 27 · 2015: 17 · 2014: 18 · 2013: 15 · 2012: 2
FWCI
7.65
Type
journal article
Language
en
Open access
closed
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Office of Naval Research
  • Defense Advanced Research Projects Agency
  • National Science Foundation
  • U.S. Department of Energy
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › GaN-based semiconductor devices and materials
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal Expansion and Ionic Conductivity
Keywords
gallium nitride, lattice thermal conductivity, isotope effects, phonon-phonon scattering, mass ratio effects

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