Güncel Gönderiler: Fizik Bölümü
Toplam kayıt 230, listelenen: 81-100
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The thickness effect on the electrical conduction mechanism in titanium oxide thin films
(ELSEVIER SCIENCE SA, 2010)In this paper we made a study on the effect of films thickness on the electrical conduction properties of nanostructured TiO(2) thin films deposited by d.c. reactive sputtering. The deposition was performed on heated (573 ... -
The temperature dependence of the inelastic scattering time in InGaN grown by MOVPE
(AMER INST PHYSICS, 2010)Low temperature electrical measurements of the resistivity, the Hall effect and the magnetoconductivity were performed on an InGaN sample having an electron concentration far above the critical value for the metal-insulator ... -
Investigation of low-temperature electrical conduction mechanisms in highly resistive GaN bulk layers extracted with Simple Parallel Conduction Extraction Method
(SPRINGER HEIDELBERG, 2010)The electrical conduction mechanisms in various highly resistive GaN layers of Al (x) Ga1-x N/AlN/GaN/AlN heterostructures are investigated in a temperature range between T=40 K and 185 K. Temperature-dependent conductivities ... -
DFT based computational study on the molecular conformation, NMR chemical shifts and vibrational transitions for N-(2-methylphenyl) methanesulfonamide and N-(3-methylphenyl) methanesulfonamide
(ELSEVIER SCIENCE BV, 2010)This paper presents a DFT quantum chemical investigation of the molecular conformation, NMR chemical shifts and vibrational transitions of N-(2-methylphenyl)methanesulfonamide and N-(3-methylphenyl)methanesulfonamide ... -
A simulation model for dielectric relaxation based on defect diffusion model and waiting time problems
(ELSEVIER SCIENCE BV, 2010)We propose a simulation model for dielectric relaxation based on defect diffusion. The defect diffusion model (DDM) has been used to interpret dielectric relaxation and other relaxation phenomena. The essential feature of ... -
Comparing of the host-guest interaction in the Hofmann-1,10-diaminodecane and Hofmann-1,12-diaminododecane-type clathrates
(SPRINGER, 2010)M(1,12-diaminododecane)Ni(CN)4.G (M = Co, Ni or Cd; G = chlorobenzene; 1,2-; 1,3- or 1,4- dichlorobenzene) clathrates were prepared in powder form for the first time and their infrared spectra were reported and then compared ... -
Orthorhombic intermediate phases for the wurtzite-to-rocksalt phase transformation of CdSe: An ab initio constant pressure study
(ELSEVIER SCIENCE BV, 2010)Pressure-induced phase transition of CdSe is studied using constant pressure ab initio molecular dynamic simulations. A phase transition from the wurtzite structure to a rocksalt structure is successfully observed through ... -
Formation of a Cmcm phase in SnS at high pressure; an ab initio constant pressure study
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)The stability of SnS at high pressure is studied using a constant pressure ab wino technique. For the first time, a pressure-induced phase transformation from the Prima structure to a Cmcm structure with the application ... -
FT-IR, FT-Raman, NMR spectra and DFT calculations on 4-chloro-N-methylaniline
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)In this work, the vibrational spectral analysis was carried out by using FT-IR and FT-Raman spectroscopy in the range 400-4000 and 50-3500 cm(-1) respectively, for the title molecule. The structural and spectroscopic data ... -
Formation of Anatase Phase in HfO2 in Tensile Stress: An Ab Initio Study
(WILEY-BLACKWELL, 2010)We report a direct computational evidence of a phase transformation from the baddeleyite phase to an anatase-like phase in HfO2 with the application of tensile stress. The phase transformation is first order and associated ... -
Vibrational properties of amorphous germanium under pressure and its thermal expansion and Gruneisen parameters
(ELSEVIER SCIENCE BV, 2010)We study the vibrational properties of amorphous germanium at high pressures using a constant pressure ab initio technique. With the application of pressure, the low-frequency modes gradually soften with a decrease in their ... -
Determination of the critical indium composition corresponding to the metal-insulator transition in InxGa1-xN (0.06 <= x <= 0.135) layers
(ELSEVIER SCIENCE BV, 2010)The low-temperature conductivity of InxGa1-xN alloys (0.06 <= x <= 0.135) is analyzed as a function of indium composition (x). Although our InxGa1-xN alloys were on the metallic side of the metal-insulator transition, ... -
Structural conformations and vibrational spectral study of chloroflavone with density functional theoretical simulations
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)NIR-FT Raman and FT-IR spectra of 6-chloroflavone were recorded and analyzed. The vibrational wavenumber of the compound have been computed using B3LYP/6-31++G(d,p) level to derive the equilibrium geometry, conformational ... -
Ab initio molecular dynamics study of pressure-induced phase transformation in KCl
(ELSEVIER SCIENCE BV, 2010)We carry out an ab initio constant pressure molecular dynamics technique to study the pressure-induced phase transition in KCl. A phase transformation from the rocksalt structure to the CsCl type structure is successfully ... -
Molecular structure and vibrational spectra of 2-and 5-methylbenzimidazole molecules by density functional theory
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)The FT-IR and FT-Raman spectra of 2-methylbenzimidazole (2-MB) and 5-methylbenzimidazole (5-MB) molecules have been recorded between 400-4000 cm(-1) and 50-3500 cm(-1) region, respectively. The molecular geometry and ... -
The substrate temperature dependent electrical properties of titanium dioxide thin films
(SPRINGER, 2010)Titanium dioxide thin films were obtained by a dc sputtering technique onto heated glass substrates. The relationship between the substrate temperature and the electrical properties of the films was investigated. Electrical ... -
FT-Raman, FT-IR spectral and DFT studies on 6, 8-dichloroflavone and 6, 8-dibromoflavone
(JOHN WILEY & SONS LTD, 2010)In this study, experimental and theoretical vibrational spectral results of the molecular structures of 6,8-dichloroflavone (6,8-dcf) and 6,8-dibromoflavone (6,8-dbf) are presented. The FT-IR and FT-Raman spectra of the ... -
FT-Raman, FT-IR spectra and DFT calculations on monomeric and dimeric structures of 5-fluoro- and 5-chloro-salicylic acid
(WILEY, 2010)The experimental and theoretical study on the structures and vibrations of 5-fluoro-salicylic acid and 5-chloro-salicylic acid (5-FSA and 5-ClSA, C7H5FO3 and C7H5ClO3) is presented. The Fourier transform infrared spectra ... -
Scattering analysis of two-dimensional electrons in AlGaN/GaN with bulk related parameters extracted by simple parallel conduction extraction method
(AMER INST PHYSICS, 2010)We carried out the temperature (22-350 K) and magnetic field (0.05 and 1.4 T) dependent Hall mobility and carrier density measurements on Al(0.22)Ga(0.78)N/GaN heterostructures with AlN interlayer grown by metal-organic ... -
Electron-Electron Interactions in Sb-Doped SnO2 Thin Films
(SPRINGER, 2010)Electrical conductivity and Hall-effect measurements on undoped and Sb-doped SnO2 thin films prepared by the sol-gel technique were carried out as a function of temperature (55 K to 300 K). Structural characterizations of ...
