Journal of Theoretical and Applied Physics
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Thermodynamics of nonlinearly charged black holes in the Brans–Dicke modified gravity theory
Journal of Theoretical and Applied Physics - Tập 12 - Trang 147-157 - 2018
In this work, the charged black hole solution to the Brans–Dicke gravity theory in the presence of the nonlinear electrodynamics has been investigated. To simplify the field equations, a conformal transformation has been introduced which transforms the Brans–Dicke–Born–Infeld Lagrangian to that of Einstein-dilaton–Born–Infeld theory. A new class of
...... hiện toàn bộ
Effect of dye concentration on the optical properties of red-BS dye-doped PVA film
Journal of Theoretical and Applied Physics - Tập 8 - Trang 117-121 - 2014
In this experimental study, the effect of dye concentration on the optical properties of red-BS dye-doped polyvinyl alcohol (PVA) thin films is investigated. Three thin film samples with different concentration of red-BS dye were prepared by spin-coating method on the glass substrate. Using transmission and reflection spectrum of films, their optical parameter such as refractive index, absorption ...... hiện toàn bộ
The texture ordering in L10-FePt–Ag nanocomposites
Journal of Theoretical and Applied Physics - Tập 14 - Trang 47-51 - 2019
L10-FePt nanoparticles with different Ag percentages were prepared. The presence of 6% Ag in co-sputtering process with deposition rate of 1 $$ {\dot{A}}/\text{s} $$ at 500 °C led to the formation of FePt nanoparticles with 5–7 nm size in L10-fct phase. Moreover, Ag atoms laying in boundaries of these nanoparticles in these circumstances caused c axis to orient and (001) peak intensity in XRD spec...... hiện toàn bộ
Theoretical analysis of a thermal plasma-loaded relativistic traveling wave tube having corrugated slow wave structure with solid electron beam
Journal of Theoretical and Applied Physics - Tập 9 - Trang 59-66 - 2015
A relativistic traveling wave tube with thermal plasma-filled corrugated waveguide is driven by a finite solid electron beam with the entire system immersed in a strong longitudinal magnetic field that magnetized plasma and electron beam. The dispersion relation for the relativistic traveling wave tube is obtained by linear fluid theory. The numerical results show that the growth rate decreases by...... hiện toàn bộ
Simulation study to find suitable dopants of CdS buffer layer for CZTS solar cell
Journal of Theoretical and Applied Physics - Tập 14 - Trang 75-84 - 2019
The performance of CZTS solar cell, a promising candidate in the field of energy production from sunlight, can be improved by optimizing the parameters of most widely used CdS buffer layer. In this work, numerical study have been done on the typical CZTS solar cell structures containing Mo thin film as back contact on glass substrate using SCAPS-1D solar cell simulation software. Then, the CZTS ha...... hiện toàn bộ
Two and three particles entanglement; helicity and spin with momentum
Journal of Theoretical and Applied Physics - Tập 11 - Trang 263-268 - 2017
Construction of the reduced spin and helicity density matrix for systems of two and three particles are described by a wave packet with sharp and Gaussian momentum distribution. The entropy for the spin and helicity part of the systems is calculated from the viewpoint of moving observers.
Butterfly-like phase shift: a novel gauge for critical coupling of add–drop resonator
Journal of Theoretical and Applied Physics - Tập 12 - Trang 127-134 - 2018
Optical transfer function for add–drop resonator is derived in the presence of coupling loss using the scattering matrix method. A critical coupling condition for ADR is calculated. The response of the ADR under variation of coupling losses and coupling coefficients is studied. The number of allowed states under the critical condition is determined. The full width at half maximum as sharp as 0.17 ...... hiện toàn bộ
Efficient single-layer light-emitting diodes based on organic–inorganic lead halide perovskite and tuning luminescence properties
Journal of Theoretical and Applied Physics - Tập 13 - Trang 133-140 - 2019
Because of the interesting features of the organic/inorganic halide perovskite (e.g., CH3NH3PbX3, X = Cl, Br) materials, such as long electron–hole diffusion length, high absorption coefficient and adjustable band gap, they have attracted a great deal of attention. In this research, CH3NH3PbX3 (X = Br, Cl) are synthesized and perovskite-based single-layer and perovskite-based bilayer diodes are fa...... hiện toàn bộ
In vitro bioactivity of silicophosphate glasses doped with ZnO, SrO or CuO
Journal of Theoretical and Applied Physics - Tập 14 - Trang 159-169 - 2020
Silicophosphate glasses with variable divalent ion dopants (Zn2+, Sr2+ or Cu2+) were prepared via melt annealing route. Parent and doped glasses were thermally heat-treated through a two-step regime to be converted into their glass–ceramic derivatives. Fourier transform infrared (FT-IR) spectral data were recorded for parent glasses and their glass–ceramics derivatives to identify the structural b...... hiện toàn bộ
A comparative investigation on growth, nanostructure and electrical properties of copper oxide thin films as a function of annealing conditions
Journal of Theoretical and Applied Physics - Tập 8 - Trang 1-8 - 2014
This paper is an attempt to compare the influence of various annealing conditions on growth, nanostructure, surface morphology and electrical properties of copper oxide thin films. Cu thin films of 85 nm thickness were deposited on glass substrate by thermal evaporation method, and then post-annealed at different environments (air and oxygen flow), different temperatures (200–400 °C) and different...... hiện toàn bộ
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