Peculiarities of terahertz spectra of layered TlInS 2  crystals

R. M. Sardarly; A. Z. Badalov; A. P. Abdullaev; T. N. Vezirova; F. Garet; J.-L. Coutaz; A. A. Oruzhova

doi:10.1134/S1063783416010285

Peculiarities of terahertz spectra of layered TlInS₂ crystals

Authors: Sardarly R.M.¹, Badalov A.Z.², Abdullaev A.P.¹, Vezirova T.N.², Garet F.³, Coutaz J.³, Oruzhova A.A.¹
Affiliations:
1. Institute of Radiation Problems
2. National Academy of Aviation
3. IMEP-LAHC, UMR CNRS 5130
Issue: Vol 58, No 1 (2016)
Pages: 25-29
Section: Semiconductors
URL: https://journal-vniispk.ru/1063-7834/article/view/196745
DOI: https://doi.org/10.1134/S1063783416010285
ID: 196745

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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.