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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2024, Volume 120, Issue 8, Pages 590–597
DOI: https://doi.org/10.31857/S0370274X24100164 (Mi jetpl7348) 		 
This article is cited in 1 scientific paper (total in 1 paper)

OPTICS AND NUCLEAR PHYSICS

Infrared transmission spectra of TiS$_3$: fundamental absorption edge, phonons, and excitons

K. N. Boldyreva, E. V. Mostovschikovab, A. N. Titovb, V. Ya. Pokrovskiic, I. G. Gorlovac

a Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, 108840 Russia
b Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620108 Russia
c Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, 125009 Russia
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DOI: https://doi.org/10.31857/S0370274X24100164
Abstract: Transmission spectra of TiS$_3$ single crystal whiskers in the infrared and optical bands have been studied at various light polarizations in the temperature range from room to liquid helium. The absolute absorption coefficients have been determined. Previously unknown phonon modes have been observed in the far infrared region. The study of the temperature dependence of the band gap width ${{\mathcal{E}}_{{\text{g}}}}$ has shown that it increases by 50 meV under cooling from 300 to 5 K. The comparison of spectra measured at different polarization directions indicates that the optical gap is anisotropic. A 1.28-eV absorption peak has been detected below $\sim$ 150 K and has been attributed to the excitation of excitons.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation FFUU-2024-004
Russian Science Foundation 22-12-00319
V.Ya. Pokrovskii acknowledges the support of the Russian Science Foundation (project sample 22-12-00319, processing and analysis of the results, as well as the writing of the manuscript). I.G. Gorlova acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation (state assignment for the Kotel’nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, preparation of the TiS$_3$ crystals to the studies). K.N. Boldyrev acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation (state assignment no. FFUU-2024-004 for the Institute of Spectroscopy, Russian Academy of Sciences).
Received: 02.06.2024
Revised: 09.09.2024
Accepted: 09.09.2024
English version:
Journal of Experimental and Theoretical Physics Letters, 2024, Volume 120, Issue 8, Pages 565–572
DOI: https://doi.org/10.1134/S002136402460335X
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: K. N. Boldyrev, E. V. Mostovschikova, A. N. Titov, V. Ya. Pokrovskii, I. G. Gorlova, “Infrared transmission spectra of TiS$_3$: fundamental absorption edge, phonons, and excitons”, Pis'ma v Zh. Èksper. Teoret. Fiz., 120:8 (2024), 590–597; JETP Letters, 120:8 (2024), 565–572
Citation in format AMSBIB
\Bibitem{BolMosTit24}
\by K.~N.~Boldyrev, E.~V.~Mostovschikova, A.~N.~Titov, V.~Ya.~Pokrovskii, I.~G.~Gorlova
\paper Infrared transmission spectra of TiS$_3$: fundamental absorption edge, phonons, and excitons
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2024
\vol 120
\issue 8
\pages 590--597
\mathnet{http://mi.mathnet.ru/jetpl7348}
\crossref{https://doi.org/10.31857/S0370274X24100164}
\edn{https://elibrary.ru/NQACFO}
\transl
\jour JETP Letters
\yr 2024
\vol 120
\issue 8
\pages 565--572
\crossref{https://doi.org/10.1134/S002136402460335X}
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