Yayın tarihi için Fizik Bölümü Koleksiyonu listeleme
Toplam kayıt 189, listelenen: 41-60
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Measurement and comparison of silicon p-i-n-photodiodes with ac impedance at different voltages
(Maik Nauka/Interperiodica/Springer, 2008)The dark alternating current (ac) parameters of commercially available silicon p-i-n-photodiodes are measured and compared at room temperature both in forward and reverse bias using the impedance spectroscopy technique. ... -
Peculiarities of inversion walls and singular points in oriented textures of nematic mesophase
(Wiley-V C H Verlag Gmbh, 2009)In this work the nature and peculiarities of the inversion walls and singular points, which can spontaneously arise or can be stimulated in the homeotropic and planar oriented textures of the thermotropic nematogens, have ... -
The effects of preparation temperature on the main electrical parameters of Al/TiO2/p-Si (MIS) structures by using sol-gel method
(Springer, 2009)In this study, the forward bias current-voltage (I-V) and capacitance-voltage (C-V) characteristics of the Al/TiO2/p-Si (MIS) structures derived using the sol-gel method have been investigated and compared at various ... -
Observation of negative photoconductivity in (ZnO)(x)(CdO)(1-x) films
(Pergamon-Elsevier Science Ltd, 2009)In this study, (ZnO)(x)(CdO)(1-x) films were prepared by ultrasonic spray pyrolysis (USP) technique at a substrate temperature of 400 degrees C. X-ray diffraction patterns of the films indicate that the (ZnO)(x)(CdO)(1-x) ... -
Quantum Hall effect in a high-mobility two-dimensional electron gas on the surface of a cylinder
(Amer Physical Soc, 2009)The quantum Hall effect is investigated in a high-mobility two-dimensional electron gas on the surface of a cylinder. This special topology leads to a spatially varying filling factor along the current path. The resulting ... -
Current-direction-induced rectification effect on (integer) quantized Hall plateaus
(Edp Sciences S A, 2009)Current distribution across narrow Hall bars in out of linear response regime is studied within a self-consistent Hartree-type mean-field approximation for samples which are equally and unequally depleted laterally. The ... -
Interaction-mediated asymmetries of the quantized Hall effect
(Epl Association, European Physical Society, 2009)Experimental and theoretical investigations on the integer quantized Hall effect in gate-defined narrow Hall bars are presented. At low electron mobility the classical (high-temperature) Hall resistance line R(H)(B) cuts ... -
Electrostatic screening and experimental evidence of a topological phase transition in a bulk quantum Hall liquid
(Iop Publishing Ltd, 2009)The electrostatic screening of a medium disordered quantum Hall liquid was investigated using an electric field penetration (EFP) technique. At sufficiently low temperatures and at magnetic fields corresponding to the ... -
Investigation of temperature dependent dc current transport mechanism on Au/poly(4-vinyl phenol)/p-Si device
(Iop Publishing Ltd, 2009)In this study, temperature dependent current-voltage (I-V) measurements and investigation of the dc current transport mechanism of Au/poly(4-vinyl phenol)/p-Si device have been performed. While the series resistance value ... -
The effect of repeated annealing temperature on the structural, optical, and electrical properties of TiO2 thin films prepared by dip-coating sol-gel method
(Springer, 2009)In this study, we have studied the effect of repeated annealing temperatures on TiO2 thin films prepared by dip-coating sol-gel method onto the glasses and silicon substrates. The TiO2 thin films coated samples were ... -
The self-consistent calculation of exchange enhanced odd integer quantized Hall plateaus within Thomas-Fermi-Dirac approximation
(Elsevier Science Bv, 2010)We study the emergent role of many-body effects on a two-dimensional electron gas (2DEG) within the Thomas-Fermi-Dirac-Poisson approximation, including both the exchange and correlation interactions in the presence of a ... -
Microscopic theory of the activated behavior of the quantized Hall effect
(Elsevier Science Bv, 2010)The thermally activated behavior of the gate defined narrow Hall bars is studied by analyzing the existence of the incompressible strips within a Hartree-type approximation. We perform self-consistent calculations considering ... -
Spatial distribution of the incompressible strips at AB interferometer
(Elsevier Science Bv, 2010)In this work, the edge physics of an Aharonov-Bohm interferometer (ABI) defined on a two dimensional electron gas, subject to strong perpendicular magnetic field B, is investigated. We solve the three dimensional Poisson ... -
The current polarization rectification of the integer quantized Hall effect
(Elsevier Science Bv, 2010)We report on our theoretical investigation considering the widths of quantized Hall plateaus (QHPs) depending on the density asymmetry induced by the large current within the out-of-linear response regime. We solve the ... -
The effect of aging on the dark conductivity and noise in hydrogenated microcrystalline silicon thin films
(Wiley-V C H Verlag Gmbh, 2010)Aging hydrogenated microcrystalline silicon in air is found to affect both the dark conductivity and the 1/f noise. For a sample with a crystalline volume fraction of 0.39, the conductivity decreased by three orders of ... -
Investigation of light induced degradation in hydrogenated amorphous silicon-germanium alloy thin films using temperature dependent photoconductivity
(Wiley-V C H Verlag Gmbh, 2010)Light induced degradation of undoped hydrogenated amorphous silicon-germanium (a-SiGe:H) alloys with different Ge contents has been investigated using intensity and temperature dependence of photoconductivity between 78K ... -
The effects of native and light induced defects on optoelectronic properties of hydrogenated amorphous silicon-germanium (a-SiGe:H) alloy thin films
(Springer, 2010)Effects of native and light induced defects states in hydrogenated amorphous silicon-germanium alloy thin films with different Ge concentrations have been investigated by using steady-state photoconductivity, dual beam ... -
In vitro biocompatibility of plasma-aided surface-modified 316L stainless steel for intracoronary stents
(Iop Publishing Ltd, 2010)316L-type stainless steel is a raw material mostly used for manufacturing metallic coronary stents. The purpose of this study was to examine the chemical, wettability, cytotoxic and haemocompatibility properties of 316L ... -
Instability effects in hydrogenated microcrystalline silicon thin films
(Wiley-V C H Verlag Gmbh, 2010)Instability effects on the dark conductivity (sigma(Dark)) and photoconductivity (sigma(photo)) of microcrystalline silicon films with different microstructures deposited on smooth and rough substrates, after exposure to ... -
Phase states and thermomorphologic, thermotropic, and magnetomorphologic properties of lyotropic mesophases: Sodium lauryl sulphate-water-1-decanol liquid-crystalline system
(Amer Physical Soc, 2010)Phase states in sodium lauryl sulphate-water-1-decanol lyotropic liquid-crystalline system have been investigated for different temperature ranges. The dependence of triangle phase diagram types, phase boundaries, and ...