Abstract
Vibrational spectra of TlInS2 crystals in the terahertz frequency range (0.1–3 THz) have been obtained and analyzed. The observed low-frequency band is attributed to the libration oscillations of nanolayers (so-called boson peak). A correlation between the coherent low-frequency oscillation and a disordered character of the crystal structure is shown. A conclusion is made on the presence of a topological disorder that manifests itself on the layered subsystem level.
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Original Russian Text © R.M. Sardarly, A.Z. Badalov, A.P. Abdullaev, T.N. Vezirova, F. Garet, J.-L. Coutaz, A.A. Oruzhova, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 1, pp. 27–31.
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Sardarly, R.M., Badalov, A.Z., Abdullaev, A.P. et al. Peculiarities of terahertz spectra of layered TlInS2 crystals. Phys. Solid State 58, 25–29 (2016). https://doi.org/10.1134/S1063783416010285
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DOI: https://doi.org/10.1134/S1063783416010285