Trapping center parameters in TlInS2 layered crystals by thermally stimulated current measurements

Yuksek, NS
Hasanlı, Nızamı
Ozkan, H
Karci, O
Thermally stimulated current measurements are carried out on TlInS2 layered single crystal with the current flowing perpendicular to the c-axis in the temperature range of 10 to 90 K. The results are analyzed according to various methods, such as curve fitting, heating rate, and initial rise methods, which seem to be in good agreement with each other. Experimental evidence is found for one trapping center in TlInS2 crystal in the low-temperature region.


Trap distribution in TlInS2 layered crystals from thermally stimulated current measurements
IŞIK, MEHMET; Goksen, K.; Hasanlı, Nızamı; Ozkan, H. (Korean Physical Society, 2008-02-01)
We have carried out thermally stimulated current (TSC) measurements with the current flowing along the layer on as-grown TlInS2 layered single crystals in the low temperature range 10 - 110 K with different heating rates of 0.1 - 1.5 K/s. Experimental evidence was found for the presence of two shallow electron trapping centers with activation energies of 12 and 14 meV. Their capture cross sections have been determined as 2.2 x 10(-23) and 7.1 x 10(-25) cm(2), respectively. It was concluded that retrapping i...
Trapping center parameters and optical absorption in. quaternary TI4In3GaS8, Tl4InGa3Se8,and Tl2InGaS4 semiconductors
Hasanlı, Nızamı (Korean Physical Society, 2007-04-01)
We have carried out thermally stimulated current measurements on as-grown Tl(4)ln(3)GaS(8), Tl4InGa3Se8, and Tl2InGaS4 crystals in the low-temperature ranges of 10 - 90, 10 - 160, and 10 - 60 K, respectively. Using the different heating rates method, we revealed experimental evidence for trapping centers with activation energies of 12 meV (Tl4In3GaS8), 17 meV (Tl(4)lnGa(3)Se(8)), and 10 meV (Tl(2)lnGaS(4)). The capture cross sections of the traps were found to be 3.0 x 10(-25), 2.0 x 10(-26), and 1.3 x 10(-...
Tuning Optical Absorption Edge by Composition and Temperature in TlGaS2xSe2((1-x)) Layered Mixed Crystals (0 <= x <= 1)
Hasanlı, Nızamı (Institute of Physics, Polish Academy of Sciences, 2012-10-01)
Optical properties of TlGaS2xSe2((1-x)) mixed crystals (0 <= x <= 1) have been studied using the transmission and reflection measurements in the wavelength range of 400-1100 nm. The optical indirect band gap energies were determined through the analysis of the absorption data. It was found that the energy band gaps increase with increase of sulfur atoms content in TlGaS2xSe2(1-x) mixed crystals. From the transmission measurements carried out in the temperature range of 10-300 K, the rates of change of the i...
Parameter Identification in MHD Duct Flow Cauchy Problem using the DRBEM
Tezer, Münevver (2018-08-31)
In this study, the Hartmann number (Ha) is identified through the inverse formulation of Cauchy problem for magnetohydrodynamic (MHD) flow in a duct with insulated but no-slip or variably slipping walls. The solutions for direct and inverse problems are obtained using the dual reciprocity boundary element method (DRBEM), and Tikhonov regularization with L-curve method is used for solving ill-conditioned linear system of equations resulted from the inverse problem. The velocity and the induced magnetic field...
Specific heat of NH4Br and NH4BrxCl1-x crystals close to the antiferroelectric transition
Yurtseven, Hasan Hamit (AIP Publishing, 2005-11-01)
We calculate the specific heat C-VI of NH4Br and mixed crystals of NH4BrxCl1-x using the Ising model for the transition between the disordered (D) and antiferro- (AF) electric phases in these crystalline systems. Our C-VI values, which we calculated for x(Br)=1, 0.26, and 0.51 are in good agreement, both below and above T-C, with the observed C-P data from the literature. Our value of congruent to 0.1 (T < T-C and T>T-C) for the critical exponent of the specific heat agrees with the value of 0.125 predicted...
Citation Formats
N. Yuksek, N. Hasanlı, H. Ozkan, and O. Karci, “Trapping center parameters in TlInS2 layered crystals by thermally stimulated current measurements,” ACTA PHYSICA POLONICA A, pp. 95–103, 2004, Accessed: 00, 2020. [Online]. Available: