| Issue |
E3S Web Conf.
Volume 385, 2023
2023 8th International Symposium on Energy Science and Chemical Engineering (ISESCE 2023)
|
|
|---|---|---|
| Article Number | 03017 | |
| Number of page(s) | 5 | |
| Section | Thermochemical Engineering and Waste Treatment | |
| DOI | https://doi.org/10.1051/e3sconf/202338503017 | |
| Published online | 04 May 2023 | |
First-principles study of the thermal transport properties of superconducting NbN
Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
a L22010085@mail.dlut.edu.cn
b* zhangxiaoliang@dlut.edu.cn
c* dwtang@dlut.edu.cn
We investigate the thermal transport properties of NbN by considering three-phonon scattering (3ph), four-phonon scattering (4ph), electron-phonon (ep) scattering, and isotope (iso) scattering. By considering 4ph scattering, we find that 4ph scattering has less effect on the lattice thermal conductivity (κph) within 3-9 THz, while ep scattering has a greater effect on κph which is close to 3ph scattering in this frequency range. When the pressure is increased to 15 GPa, the κph by 148%, which is due to the decrease of the scattering phase space resulting in an increase of phonon relaxation time. We find that the κph of NbN is close to 100 W/mK, which is a potential high thermal conductivity material.
© The Authors, published by EDP Sciences, 2023
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