Reflection from the Side Face of a PbSb2Te4 Crystal

• Published in: Semiconductors (Woodbury, N.Y.) Vol. 54; no. 3; pp. 282 - 284
• Main Authors: Nemov, S. A., Ulashkevich, Yu. V., Pogumirsky, M. V., Stepanova, O. S.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2020; Springer Nature B.V
• Subjects: Crystal lattices; Crystals; Electronic Properties of Semiconductors; Lattice vibration; Magnetic Materials; Magnetism; Physics; Physics and Astronomy; Plasma oscillations; Polarized light; Room temperature; Te; Drude–Lorentz model; thermoelectric materials; PbSb; reflectance spectrum; crystal
• ISSN: 1063-7826; 1090-6479
• DOI: 10.1134/S1063782620030161

The reflectance spectra of the side face of the PbSb
2
Te
4
crystal are for the first time recorded under polarized light in the range of wave numbers 50–4000 cm
–1
at room temperature. It is shown that the crystal is highly anisotropic in the directions parallel and orthogonal to the layers of the crystal. The observed specific features of the spectra are attributed to the contribution of plasma oscillations and crystal-lattice vibrations. The parameters of the dielectric function calculated in the context of the Drude–Lorentz model are in agreement with the experimental data.