Temperature and pressure behavior of absorption edge of TlIn(S<sub>0,98</sub>Se<sub>0,02</sub>)<sub>2</sub> single crystals

Authors

  • Р. Р. Росул Department of Optics, Uzhhorod National University, Ukraine
  • П. П. Гуранич Department of Optics, Uzhhorod National University, Ukraine
  • О. О. Гомоннай Department of Optics, Uzhhorod National University, Ukraine
  • О. Г. Сливка Department of Optics, Uzhhorod National University, Ukraine
  • О. М. Хмара Department of Optics, Uzhhorod National University, Ukraine
  • О. В. Гомоннай Institute of Electron Physics, Ukr. Nat. Acad. Sci, Ukraine
  • І. Ю. Роман Institute of Electron Physics, Ukr. Nat. Acad. Sci, Ukraine

DOI:

https://doi.org/10.24144/2415-8038.2012.31.23-28

Keywords:

Ferroelectrics, Phase Transitions, Incommensurate phase, Absorption spectra

Abstract

Optical absorption spectra of TlIn(S0.98Se0.02)2 single crystals under hydrostatic pressure were investigated in the temperature range of 160–340 K. Founded, that the absorption edge is increasing exponentially, it were explained using Urbach rule. Values and behavior of characteristic Urbach’s parameters in the regions of phase transitions paraelectric-incommensurate-ferroelectric were obtained.

References

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Abay B., Guder H.S., Efeoglu H., Yogurtcu Y.K. Influence of temperature and phase transitions on the Urbach’s tails of absorption spectra for TlInS2

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Published

2012-06-30

Issue

Vol. 31 (2012)

Section

Статті

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Copyright (c) 2012 Scientific Herald of Uzhhorod University.Series Physics

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