Temperature-dependent optical and vibrational properties of PtSe₂ thin films.

ABSTRACT: PtSe₂ has received substantial research attention because of its intriguing physical properties and potential practical applications. In this paper, we investigated the optical properties of bilayer and multilayer PtSe₂ thin films through spectroscopic ellipsometry over a spectral range of 0.73-6.42 eV and at temperatures between 4.5 and 500 K. At room temperature, the spectra of refractive index exhibited several anomalous dispersion features below 1000 nm and approached a constant value in the near-infrared frequency range. The thermo-optic coefficients of bilayer and multilayer PtSe₂ thin films were (4.31 ± 0.04) × 10^-4/K and (-9.20 ± 0.03) × 10^-4/K at a wavelength of 1200 nm. Analysis of the optical absorption spectrum at room temp

SUBMITTER: Gulo DP 

PROVIDER: S-EPMC7643157 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature