This article is cited in 8 papers

Lattice dynamics

Ab initio and experimental study of electronic, optical, and vibrational properties of CdGa$_{2}$Te$_{4}$

Z. A. Jahangirli^ab, T. G. Kerimova^a, I. A. Mamedova^a, S. A. Nabiyeva^ac, N. A. Abdullaev<sup>ad

a</sup> Institute of Physics Azerbaijan Academy of Sciences, Baku, Azerbaijan
^b Azerbaijan Technical University, Baku
^c Academy of the Ministry of Emergency Situations of Azerbaijan Republic, Baku, Azerbaijan
^d Baku State University

Abstract: The electronic, optical, and lattice vibrational properties of CdGa$_2$Te$_4$ were studied experimentally using spectral ellipsometry, Raman scattering (Raman scattering) and infrared (IR) spectroscopy, as well as theoretically using the density functional theory (DFT). Eight Raman-active modes and twelve IR-active modes were detected and identified from consideration of the point group symmetry. Based on the analysis of the electronic spectrum and the density of states, the nature of the chemical bond in this semiconductor compound is determined. The theoretically calculated results are compared with the experimental data of the present work and with the results of experimental data available in the literature obtained by infrared spectroscopy and Raman scattering.

Keywords: CdGa$_2$Te$_4$, Raman, IR active modes, phonon dispersion, density of states.

Received: 06.02.2020
Revised: 06.02.2020
Accepted: 06.04.2020

DOI: 10.21883/FTT.2020.08.49613.024

 English version: Physics of the Solid State, 2020, 62:8, 1426–1433

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