Physics / Fizik
Recent Submissions
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Tuning thermal transport in graphene via combinations of molecular antiresonances
(Elsevier, 2018-12)We propose a method to engineer the phonon thermal transport properties of low dimensional systems. The method relies on introducing a predetermined combination of molecular adsorbates, which give rise to antiresonances ... -
Characterization of thin film Li0.5La0.5Ti1−xAlxO3 electrolyte for all-solid-state Li-ion batteries
(Elsevier, 2018-10)Since addition of Al in Li0.5La0.5TiO3 has enhanced ionic conductivity in bulk materials, it is important to apply this material on all solid state thin film batteries. Because some of the good ionic conductors such as ... -
Defect induced Anderson localization and magnetization in graphene quantum dots
(Elsevier, 2018-10)We theoretically investigate the effects of atomic defect related short-range disorders and electron-electron interactions on Anderson type localization and the magnetic properties of hexagonal armchair graphene quantum ... -
Effects of random atomic disorder on the magnetic stability of graphene nanoribbons with zigzag edges
(American Physical Society, 2018-09)We investigate the effects of randomly distributed atomic defects on the magnetic properties of graphene nanoribbons with zigzag edges using an extended mean-field Hubbard model. For a balanced defect distribution among ... -
Thermodynamics of regular black holes with cosmic strings
(Springer, 2018-09)In this article, the thermodynamics of regular black holes with a cosmic string passing through them is studied. We will observe that the string has no effect on the temperature as well as on the relation between entropy ... -
Epitaxial graphene thermistor for cryogenic temperatures
(Elsevier, 2018-09)The thermal responsivity of monolayer epitaxial graphene grown on the Si-face surface of semi-insulating SiC substrate is investigated as a function of temperature below 300 K. The measurements showed that adsorption/desorption ... -
Identifying threading dislocations in CdTe films by reciprocal space mapping and defect decoration etching
(American Institute of Physics, 2018-08)We study threading dislocation (TD) density of high-quality cadmium telluride (CdTe) layers grown on a (211) oriented GaAs substrate by molecular beam epitaxy. High-resolution X-ray diffraction was performed to calculate ... -
Effect of annealing on the density of defects in epitaxial CdTe (211)/GaAs
(Springer, 2018-08)CdTe thin films were grown on GaAs (211) wafers by molecular beam epitaxy as the buffer layer for HgCdTe infrared detector applications. We studied the effect of annealing on the density of dislocation of these CdTe thin ... -
Cross-like terahertz metamaterial absorber for sensing applications
(Springer, 2018-08)In this work, a new multiband terahertz metamaterial absorber is designed and characterised by numerical simulation method. In addition, the utilisation of the proposed absorber as a sensor is also investigated. The ... -
Structural, vibrational, and electronic properties of single-layer hexagonal crystals of group IV and v elements
(American Physical Society, 2018-07)Using first-principles density functional theory calculations, we investigate a family of stable two-dimensional crystals with chemical formula A2B2, where A and B belong to groups IV and V, respectively (A=C, Si, Ge, Sn, ... -
Are there really conformal frames? Uniqueness of affine inflation
(World Scientific Publishing, 2018-07)Here, we concisely review the nonminimal coupling dynamics of a single scalar field in the context of purely affine gravity and extend the study to multifield dynamics. The coupling is performed via an affine connection ... -
Monitoring the doping and diffusion characteristics of Mn dopants in cesium lead halide perovskites
(American Chemical Society, 2018-05)Cesium lead perovskites, in the form of CsPbX3 or Cs4PbX6, have been widely used for various optoelectronic applications due to their exceptionally good optical properties. In this study, the effect of Mn doping on the ... -
Effect of substrate rotation speed and off-center deposition on the structural, optical, and electrical properties of AZO thin films fabricated by DC magnetron sputtering
(American Institute of Physics, 2018-04)In this study, aluminum-doped zinc oxide (AZO) thin films were deposited by DC magnetron sputtering at room temperature. The distance between the substrate and target axis, and substrate rotation speed were varied to get ... -
Study of undoped and indium doped ZnO thin films deposited by sol gel method
(Springer, 2018-11)In this paper, we report the effects of Indium doping concentrations (from 0 to 10wt%) on the structural, morphological, and optical properties of deposited In doped ZnO (IZO) thin films prepared by the sol–gel method ... -
The influence of plasma-based nitriding and oxidizing treatments on the mechanical and corrosion properties of CoCrMo biomedical alloy
(Springer, 2018-04)Plasma-based nitriding and/or oxidizing treatments were applied to CoCrMo alloy to improve its surface mechanical properties and corrosion resistance for biomedical applications. Three treatments were performed. A set of ... -
Strain mapping in single-layer two-dimensional crystals via Raman activity
(American Physical Society, 2018-03)By performing density functional theory-based ab initio calculations, Raman-active phonon modes of single-layer two-dimensional (2D) materials and the effect of in-plane biaxial strain on the peak frequencies and corresponding ... -
Induced affine inflation
(American Physical Society, 2018-02)Induced gravity, metrical gravity in which gravitational constant arises from vacuum expectation value of a heavy scalar, is known to suffer from Jordan frame vs Einstein frame ambiguity, especially in inflationary dynamics. ... -
P3HT-graphene bilayer electrode for Schottky junction photodetectors
(IOP Publishing, 2018-02)We have investigated the effect of a poly (3-hexylthiophene-2.5-diyl)(P3HT)-graphene bilayer electrode on the photoresponsivity characteristics of Si-based Schottky photodetectors. P3HT, which is known to be an electron ... -
Experimental and computational investigation of graphene/SAMs/n-Si Schottky diodes
(Elsevier, 2018-01)We have investigated the effect of two different self-assembled monolayers (SAMs) on electrical characteristics of bilayer graphene (BLG)/n-Si Schottky diodes. Novel 4″bis(diphenylamino)-1, 1′:3″-terphenyl-5′ carboxylic ... -
Thermally and optically tunable sub-terahertz superconducting fishnet metamaterial
(Elsevier, 2018-01)In this paper, a novel fishnet metamaterial structure is designed and analyzed under different material combinations and under different active controlling techniques. The results indicate that, the proposed fishnet ...
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