Thermal conductivity reduction in highly-doped cubic SiC by phonon-defect and phonon-electron scattering
Pang, Guijian ; Meng, Fanchen ; Chen, Yani ; Katre, Ankita ; Carrete, Jesús ; Dongre, Bonny ; Madsen, Georg K.H. ; Mingo, Natalio ; Li, Wu
Resumen: We calculate the thermal conductivity (κ) of highly N- and B-doped cubic silicon carbide (SiC) with defect concentrations (Cdef) from 1016 to 1021 cm−3 and compare the relative importance of the extrinsic phonon-electron and phonon-defect scattering mechanisms. Whereas phonon-electron scattering dominates over phonon-defect scattering at low Cdef up to about 1020 cm−3 at room temperature in N-doped SiC, phonon-defect scattering determines the thermal conductivity reduction in the B-doped case. This strong contrast between the electron- and hole-doped cases is related to the much higher ionization energy of B acceptors as compared to that of N donors, and to the resonant scattering caused by B substitution, not present for the N impurity. The similar features can be found in hexagonal phase 4H–SiC. Our results highlight the importance of considering the phonon-electron scattering mechanism together with other phonon scattering processes when calculating the thermal conductivity of doped semiconductors.
Idioma: Inglés
DOI: 10.1016/j.mtphys.2024.101346
Año: 2024
Publicado en: Materials Today Physics 41 (2024), 101346 [7 pp.]
ISSN: 2542-5293
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1016/j.mtphys.2024.101346
Año: 2024
Publicado en: Materials Today Physics 41 (2024), 101346 [7 pp.]
ISSN: 2542-5293
Tipo y forma: Article (Published version)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2024-03-22-09:46:15)
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Record created 2024-03-22, last modified 2024-03-22