Temperature-dependent optical properties of ε-Ga2O3 thin films

Autor:	Takayuki Makino, Subaru Yusa, Daichi Oka, Tomoteru Fukumura
Rok vydání:	2022
Předmět:	Physics and Astronomy (miscellaneous) General Engineering General Physics and Astronomy
Zdroj:	Japanese Journal of Applied Physics. 61:SB1031
ISSN:	1347-4065 0021-4922
DOI:	10.35848/1347-4065/ac2215
Popis:	We determined the complex dielectric functions of ε-Ga2O3 using optical transmittance and reflectance spectroscopies at temperatures from 10 K to room temperature. The measured dielectric-function spectra reveal distinct structures at bandgap energy. We fitted a model dielectric function based on the electronic energy-band structure to these experimental data. We analyzed the temperature dependence of the bandgap with a model based on phonon dispersion effects. One could explain it in terms of phonon-related parameters such as the optical phonon temperature. We compare phonon-related properties of ε-Ga2O3 with those of a large variety of element and binary semiconductors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::420ce3ecae019b826ab7c5065747504f https://doi.org/10.35848/1347-4065/ac2215 Zobrazit plný text záznamu