Urbach`s Rule and Optical Properties for TlGaS2

Authors : Aytunç ATEŞ, Bekir GÜRBULAK, Muhammet YILDIRIM

Pages : 127-132

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Publication Date : 0000-00-00

Article Type : Research Paper

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.
Keywords : Turk J Phys, 26, 2002, 127 132 Turk J Phys, vol 26, iss 2