S. A. Nemov, Yu. V. Ulashkevich, A. V. Povolotskiy, I. I. Khlamov, “Reflectance of a PbSb$_{2}$Te$_{4}$ crystal in a wide spectral range”, Fizika i Tekhnika Poluprovodnikov, 2016, Volume 50, Issue 10,Pages 1343

This article is cited in 7 papers

Spectroscopy, interaction with radiation

Reflectance of a PbSb$_{2}$Te$_{4}$ crystal in a wide spectral range

S. A. Nemov^ab, Yu. V. Ulashkevich^c, A. V. Povolotskiy^d, I. I. Khlamov^a

^a Peter the Great St. Petersburg Polytechnic University
^b Zabaikalsky State University, Chita
^c Ioffe Institute, St. Petersburg
^d Saint Petersburg State University

Abstract: For the anisotropic PbSb$_{2}$Te$_{4}$ single crystal with a high hole concentration ($p\approx$ 3 $\times$ 10$^{20}$ cm$^{-3}$) and high conductivity ($\sigma\approx$ 2500 $\Omega^{-1}$ cm$^{-1}$), the reflectance spectrum for a cleavage plane orthogonal to the trigonal axis $\mathbf{C}_3$ is recorded in a wide spectral range from 50 to 50000 cm$^{-1}$. It is shown that, in the long-wavelength and mid-infrared regions, the reflectance can be described with consideration for the contribution of plasma vibrations and two crystal-lattice vibrations. The quantitative characteristics of these vibrations are determined. The characteristics are in satisfactory agreement with the electrical parameters. The discrepancies between the values of the hole effective mass calculated by different methods are attributed to the complex structure of the crystal’s valence band.

Received: 14.04.2016
Accepted: 20.04.2016