Anisotropic thermal conductivity in single crystal β-gallium oxide
University of Notre Dame · Chinese Academy of Sciences · +2 more institutions
Abstract
The thermal conductivities of β-Ga2O3 single crystals along four different crystal directions were measured in the temperature range of 80–495 K using the time domain thermoreflectance method. A large anisotropy was found. At room temperature, the [010] direction has the highest thermal conductivity of 27.0 ± 2.0 W/mK, while that along the [100] direction has the lowest value of 10.9 ± 1.0 W/mK. At high temperatures, the thermal conductivity follows a ∼1/T relationship characteristic of Umklapp phonon scattering, indicating phonon-dominated heat transport in the β-Ga2O3 crystal. The measured experimental thermal conductivity is supported by first-principles calculations, which suggest that the anisotropy in…
Citation impact
- FWCI
- 7.42
- Percentile
- 100%
- References
- 35
Authors
10Topics & keywords
- Thermal conductivity
- Anisotropy
- Materials science
- Condensed matter physics
- Phonon
- Crystal (programming language)
- Atmospheric temperature range
- Single crystal
- Affordable and clean energy