Open AccessFeatures of IR reflection spectra of β-Tl1-xCuxInS2 single crystals (0 ≤ X ≤ 0.015)
Author(s) -
A. Kh. Matiyev,
R.T. Uspazhiev,
A.M. Gachaev,
И. А. Сысоев,
B. M. Khamkhoev,
T.A. Matieva,
Kh S-G Chapanov,
А. М. Багов
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1753/1/012077
Subject(s) - thallium , copper , spectral line , reflection (computer programming) , crystallography , analytical chemistry (journal) , ionic bonding , atmospheric temperature range , spectroscopy , chemistry , materials science , ion , inorganic chemistry , physics , organic chemistry , chromatography , quantum mechanics , astronomy , computer science , programming language , meteorology
The method of long-wave spectroscopy made it possible to study the IR reflection spectra of layered single crystals β-Tl 1-x Cu x InS 2 (0≤X≤0.015) in in the frequency range of 40-500 cm −1 and the temperature range of 84 ¸ 300 K. It was shown that partial substitution of thallium atoms with copper atoms leads to a decrease in the frequencies of the corresponding oscillations in the frequency range of 40-500 cm −1 and does not lead (at these concentrations) to local oscillations. It was found that solid solutions β -Tl 1-x Cu x InS 2 (X=0 ÷ 0.015) exhibit the characteristic single-mode behavior. It was shown that partial substitution of thallium atoms with copper atoms in single crystals β -Tl 1-x Cu x InS 2 (X = 0.005; 0.010; 0.015) weakens the ionic bond in Tl–S, as a result of which the frequencies of “internal” oscillations shift towards low temperatures.