Low-energy TTP scattering.

Date

1973

Author

Akşahin, Ertan

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https://hdl.handle.net/11511/3354

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Graduate School of Natural and Applied Sciences, Thesis

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Low-temperature Raman scattering in TlGaxIn1-xS2 layered mixed crystals: Compositional dependence of the mode frequencies and line shapes Hasanlı, Nızamı (Institute of Physics, Polish Academy of Sciences, 2005-12-01) The Raman spectra of TlGaxIn1-xS2 layered mixed crystals were studied for a, wide range of composition (0 <= x <= 1) at T = 50 K. The effect of crystal disorder on the line width broadening of the Raman-active modes are discussed. The asymmetry in the Raman line shape is analyzed for two interlayer and intralayer modes exhibiting one-mode behavior.
LOW-TEMPERATURE PHOTOLUMINESCENCE SPECTRA OF TLINXGA1-XS2 LAYER MIXED-CRYSTALS ALLAKHVERDIEV, KR; Hasanlı, Nızamı; AYDINLI, A (1995-06-01) Low-temperature photoluminescence spectra of TlInS2, TlIn0.95 Ga0.05S2 and TlIn0.8Ga0.2S2 layer crystals were studied in the temperature range 14-220 K. The temperature dependencies of bands 2.374eV (A), 2.570 eV (E) and 2.576 eV (F) for TlInS2 are interpreted by supposing that the crystal undergoes structural phase transitions. Band A is considered to come from a donor-acceptor recombination channel.
Low-temperature Raman scattering spectra of GaSexS1-x layered mixed crystals Hasanlı, Nızamı (Wiley, 2002-01-01) Raman scattering has been used to study the vibrational spectra of GaSexS1-x layered mixed crystals at 10 K. We report the Frequency dependencies of different modes on composition x, with particular emphasis on A(1)('(2)) (A(1g)(1)) and A(1)('(4)) (A(1g)(2)) intralayer compressional modes having low dispersion in the Brillouin zone. The appearance of additional bands is attributed to multimode behavior typically exhibited by mixed crystals of anisotropic compounds.
Low-temperature thermoluminescence in TlGaS2 layered single crystals Isik, M.; Bulur, Enver; Hasanlı, Nızamı (2013-03-01) Thermoluminescence (TL) measurements have been carried out on TlGaS2 layered single crystals in the temperature range of 10-300 K. After illuminating with blue light (similar to 470 nm) at 10 K, TL glow curves exhibited peaks around 23, 36, 58, 75 and 120 K when measured with a heating rate of 0.8 K/s. The observed peaks were analyzed using curve fitting, initial rise, and peak shape methods to determine the activation energies of the associated defect centers. Analyses have revealed the presence of five de...
Low-temperature photoluminescence in layered structured TlGa0.5In0.5Se2 crystals Hasanlı, Nızamı (2013-01-15) Photoluminescence (PL) spectra of TlGa0.5In0.5Se2 layered crystals have been studied in the wavelength region of 900-1020 nm and in the temperature range of 10-61 K. A broad PL band centered at 951 nm (1.304 eV) was observed at T = 10 K. Variations of emission band has been studied as a function of excitation laser intensity in the 0.15-51.5 mW cm(-2) range. The analysis of the spectra reveals that the peak energy position changes with laser excitation intensity (blue shift). This behavior of the emission b...

Citation Formats

E. Akşahin, “Low-energy TTP scattering.,” Middle East Technical University, 1973.