Journals / Turkish Journal of Physics / 2002 / Cilt: 26 - Sayı: 2
Urbach's Rule and Optical Properties for TlGaS2
- Journal
- Turkish Journal of Physics
- Pages
- 127–132
- DOI
- —
Abstract
Absorption measurements were carried out on TlGaS2 sample in the temperature range between 10 and 320 K in 10 K steps. There is an abrupt change in the Urbach energy at 180 K and 280 K and steepness parameter at 120 K and 220 K .Obtained from the changing of the Urbach energy, these may be phase transition temperatures. The phonon energies calculated for TlGaS2 is 19.7 \pm 5 meV.
Özet
Absorption measurements were carried out on TlGaS2 sample in the temperature range between 10 and 320 K in 10 K steps. There is an abrupt change in the Urbach energy at 180 K and 280 K and steepness parameter at 120 K and 220 K .Obtained from the changing of the Urbach energy, these may be phase transition temperatures. The phonon energies calculated for TlGaS2 is 19.7 \pm 5 meV.