Journal
PHYSICA B-CONDENSED MATTER
Volume 621, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.physb.2021.413259
Keywords
Electronic structures; Dielectric functions; Spectroscopy; Excitons
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology [KAKENHI-19K05303]
- KAKENHI [20K15169]
- Grants-in-Aid for Scientific Research [20K15169] Funding Source: KAKEN
Ask authors/readers for more resources
The complex dielectric functions of LiNbO2 were determined using optical transmittance and reflectance spectroscopies, revealing distinct structures at several bandgap energies. The bandgaps in the spectrum were observed at around 2.3, 3.2, 3.9, and 5.1 eV, and these features were quantitatively reproduced to some extent by an ab-initio calculation including the interaction effects between electrons and holes.
The complex dielectric functions of LiNbO2 were determined using optical transmittance and reflectance spectroscopies at room temperature. The measured dielectric function spectra reveal distinct structures at several bandgap energies. The bandgaps (exciton resonances) in the spectrum were observed at ca. 2.3, 3.2, 3.9, and 5.1 eV, respectively. These experimental data have been fit using a model dielectric function based on the electronic energy-band structure near critical points plus excitonic effects. The features of measured dielectric functions are, to some extent, reproduced quantitatively by an ab-initio calculation including the interaction effects between electrons and holes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available