Kovalenko Yu. E.
1, Yakushev M. V.1,2,3, Grebennikov V. I.1, Orlita M.4, Titova S. G.5, Kokh K. A.6,7,8, Tereshchenko O. E.8,9, Kuznetsova T. V.1,3
1M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
2Institute of Solid State Chemistry, Russian Academy of Sciences, Ural Branch, Yekaterinburg, Russia
3Ural Federal University after the first President of Russia B.N. Yeltsin, Yekaterinburg, Russia
4
5Institute of Metallurgy of Ural Branch of the Russian Academy of Science, Ekaterinburg, Russia
6Sobolev Institute of Geology and Mineralogy, Siberian Branch Russian Academy of Sciences, Novosibirsk, Russia
7Kemerovo State University, Kemerovo, Russia
8Novosibirsk State University, Novosibirsk, Russia
9Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
The structural and electronic properties of thin layers of single crystals of the topological insulator Sb2Te2Se were studied by X-ray diffraction and magneto-optical spectroscopy. A sharp edge of the absorption band as well as Fabry-Perot oscillations were revealed in the transmission spectra measured at 4.2 K which made it possible to estimate the band gap Eg~374 meV and the refractive index n~ 8.5. The application of magnetic fields up to 11 T led to a significant decrease in the amplitude of the oscillations attributed to the Faraday effect. The Verdet constant was estimated to be of V~103 degrees/cm · T. Keywords: topological insulator, Sb2Te2Se, magneto-optics, transmission spectrum.
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