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Reflectance and Thermoreflectance of GeTe
Author(s) -
Baleva M.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220990136
Subject(s) - spectral line , liquid nitrogen , reflectivity , range (aeronautics) , materials science , analytical chemistry (journal) , nitrogen , atmospheric temperature range , optics , atomic physics , chemistry , physics , meteorology , organic chemistry , chromatography , astronomy , composite material
The reflectance spectra of p‐type GeTe crystals are measured in the energy range 0.4 to 3.0 eV at liquid nitrogen and room temperature. The principal optical constants are obtained by inverting the spectra using the Kramers‐Kronig technique. The thermoreflectance spectra at room and liquid nitrogen temperature are measured over the energy range from 0.8 to 3.0 eV. The results are quantitatively interpreted. The relatively large and sharp changes in the thermoreflectance spectra near 1 eV are explained with the thermal width of the Fermi function, and with δ‐type transitions at 1.36 eV.