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Articles 61 - 90 of 1374
Full-Text Articles in Physical Sciences and Mathematics
Variational Field Equations Of A Majorana Neutrino Coupled To Einstein's Theory Of General Relativity, Dündar Teki̇n Dereli̇, Yorgo Şeni̇koğlu
Variational Field Equations Of A Majorana Neutrino Coupled To Einstein's Theory Of General Relativity, Dündar Teki̇n Dereli̇, Yorgo Şeni̇koğlu
Turkish Journal of Physics
A consistent variational derivation of the Majorana 4-spinor field equations coupled to Einstein's theory of gravitation is given. The equivalence of the first and the second order variational field equations is explicitly demonstrated. The Lagrange multiplier 2-forms we use turn out to be precisely the Belinfante-Rosenfeld 2-forms that are needed to symmetrize the canonical energy-momentum tensor of the Majorana spinor.
The Effect Of Interfacial Morphology On The Magnetic And Magnetocaloricproperties Of Ferromagnetic Nanoparticles With Core-Shell Geometry: A Montecarlo Study, Yusuf Yüksel
Turkish Journal of Physics
Within the framework of Monte Carlo simulations, we investigate the magnetic and magnetocaloric properties of a nanocomposite particle composed of ferromagnetic core and shell layers. We found that isothermal magnetic entropy change may exhibit two peaks associated to two different phase transitions of the core and shell layers. We paid particular attention to the microscopic details of the core/shell interface. Our results suggest that for the large values of the interface exchange coupling, the full width at half maximum is expanded at the expense of the low temperature peak of isothermal entropy change $ \Delta S_{M} $ whereas the high …
Scattering Of Kinks In Noncanonical Sine-Gordon Model, Ishmael Takyi, Benedict Barnes, Hoese Michel Tornyeviadzi, Joseph Ackora-Prah
Scattering Of Kinks In Noncanonical Sine-Gordon Model, Ishmael Takyi, Benedict Barnes, Hoese Michel Tornyeviadzi, Joseph Ackora-Prah
Turkish Journal of Physics
In this paper, we numerically study the scattering of kinks in the noncanonical sine-Gordon model using Fourier spectral methods. The model depends on two free parameters, which control the localized inner structure in the energy density and the characteristics of the scattering potential. It has been conjectured that the kink solutions in the noncanonical model possess inner structures in their energy density, and the presence of these yields bound states and resonance structures for some relative velocities between the kink and the antikink. In the numerical study, we observed that the classical kink mass decreases monotonically as the free parameters …
Properties Of Doubly Heavy Baryons In Qcd, Takhmasib Aliyev, Selçuk Bi̇lmi̇ş
Properties Of Doubly Heavy Baryons In Qcd, Takhmasib Aliyev, Selçuk Bi̇lmi̇ş
Turkish Journal of Physics
The study of the properties of doubly heavy baryons represents a promising area in particle physics. It can provide us with information about Cabibbo-Kobayashi-Maskawa (CKM) matrix elements and the low energy dynamics of QCD. They have a very rich phenomenology. The investigation of weak, electromagnetic, and strong decays has a vital importance for understanding the dynamics of doubly heavy baryons. The main ingredients of such studies are the spectroscopic parameters, the strong coupling constants, and the transition form factors. For calculations of these quantities, non-perturbative methods are needed. One of these methods is the QCD sum rules. In the present …
On An Econophysics Model, Miron Kaufman
On An Econophysics Model, Miron Kaufman
Turkish Journal of Physics
Krugman has proposed a continuous in time and space model for the emergence of polycentric urban areas in the regional space. By using a discrete version of this model on spatial networks, we predicted the distribution of jobs among the different localities inside a couple of economic regions in Ohio and Texas. The time evolution of the distribution of jobs is governed by a market potential. Employment gradually moves towards locations considered relatively attractive if their market potential is above the spatial average. Similarly, jobs move away from locations with below-average market potential. First, I will show that the market …
Dynamic Multicritical Phase Diagrams Of The Mixed Spin (2, 5/2) Blume-Emery-Griffiths Model With Repulsive Biquadratic Coupling, Mustafa Gençaslan, Mustafa Keski̇n
Dynamic Multicritical Phase Diagrams Of The Mixed Spin (2, 5/2) Blume-Emery-Griffiths Model With Repulsive Biquadratic Coupling, Mustafa Gençaslan, Mustafa Keski̇n
Turkish Journal of Physics
We investigated the dynamic phase transitions (DPTs) in the mixed spin (2, 5/2) Blume-Emery Griffiths model with repulsive biquadratic interaction in the presence of a time-varying magnetic field. We used the path probability method to obtain the set of the dynamic equations. We numerically solved these dynamic equations to characterize the nature of first- and second-order phase transitions and to find the DPT temperatures as well as obtain the phases in the system. We constructed the dynamic phase diagrams (DPDs) in reduced temperature and amplitude of oscillating magnetic field plane. We observed that the DPDs display richer, complex and more …
The Fine Spectral Tuning Of Plasmon Mode And Quantum Emitter Coupling And Itscomparison With The Dark-Hot Resonances, Hira Asif, Rasi̇m Volga Ovali, Ramazan Şahi̇n
The Fine Spectral Tuning Of Plasmon Mode And Quantum Emitter Coupling And Itscomparison With The Dark-Hot Resonances, Hira Asif, Rasi̇m Volga Ovali, Ramazan Şahi̇n
Turkish Journal of Physics
Localization of incident fields into very small volumes (hot-spots) allows strong light-matter interactions at the hot spots. This makes path interference effects, Fano resonances, visible. Fano resonances can appear due to the coupling of a bright plasmon (i) to a longer lifetime dark plasmon mode or (ii) to a quantum object (QO) of a much longer lifetime. The second phenomenon provides a very important utility: the voltage tunability of the linear/nonlinear response. The level-spacing of the QO, such as defect-centers and quantum dots, are voltage-tunable which can make a sharp Fano resonance appear and disappear. Here, we compare the two …
Topical Review: Greybody Factors And Quasinormal Modes For Black Holes Invarious Theories - Fingerprints Of Invisibles, İzzet Sakalli, Sara Kanzi
Topical Review: Greybody Factors And Quasinormal Modes For Black Holes Invarious Theories - Fingerprints Of Invisibles, İzzet Sakalli, Sara Kanzi
Turkish Journal of Physics
We give a pedagogical introduction to black holes (BHs) greybody factors (GFs) and quasinormal modes (QNMs) and share the recent developments on those subjects. To this end, we present some particular analytical and approximation techniques for the computations of the GFs and QNMs. We first review the gravitational GFs and show how they are analytically calculated for static and spherically symmetric higher dimensional BHs, consisting the charged BHs and existence of cosmological constant (i.e. de Sitter (dS)/anti-de Sitter (AdS)AdS BHs). The computations performed involve both the low-energy (having real and small frequencies) and the asymptotic (having extremely high frequency of …
Momentum Of Light In Complex Media, Yuri Obukhov
Momentum Of Light In Complex Media, Yuri Obukhov
Turkish Journal of Physics
An important issue in phenomenological macroscopic electrodynamics of moving media is the definition of the energy and momentum of the electromagnetic field in matter. Rather surprisingly, this topic has demonstrated a remarkable longevity, and the problem of the electromagnetic energy and momentum in matter remained open, despite numerous theoretical and experimental investigations. We overview the definition of the momentum of light in matter and demonstrate that, for the correct understanding of the problem, one needs to carefully distinguish situations when the material medium is modeled either as a background for light or as a dynamical part of the total system. …
Investigating The Potential Of Laser-Written One-Dimensional Photonic Crystals Inside Silicon, Onur Tokel
Investigating The Potential Of Laser-Written One-Dimensional Photonic Crystals Inside Silicon, Onur Tokel
Turkish Journal of Physics
The field of silicon photonics is based on introducing and exploiting advanced optical functionality. Current efforts in the field are based on conventional micro/nanofabrication methods, leading to optical functionality over wafer surfaces. A complementary and emerging field is introducing analogous optics directly within the wafer using lasers. Here we investigate the theoretical feasibility of a subclass of such optics, photonic crystals. Our efforts will guide future experimental efforts towards in-chip spectral control.
Extinction And Growth On An Inhomogeneous Seascape, Tung Tran, Mehran Kardar
Extinction And Growth On An Inhomogeneous Seascape, Tung Tran, Mehran Kardar
Turkish Journal of Physics
The effects of noise and nonuniformity on dynamics of populations are relevant and timely subjects of investigation. One form of variation is the time dependence of the reproduction rate (fitness), referred to as ?seascape? noise; another is time-independent intrinsic dependencies of fitness on location (in the parlance of statistical physics, corresponding to annealed and quenched disorder, respectively). The former was studied recently and demonstrated to lead to novel universality classes for extinction and growth. To reduce the gap between this theoretical model and reality, we develop a new formalism for seascape noise where growth and migration parameters are inhomogeneous. In …
Self-Consistent Markovian Embedding Of Generalized Langevin Equations With Configuration-Dependent Mass And A Nonlinear Friction Kernel, Cihan Ayaz, Lucas Tepper, Roland R. Netz
Self-Consistent Markovian Embedding Of Generalized Langevin Equations With Configuration-Dependent Mass And A Nonlinear Friction Kernel, Cihan Ayaz, Lucas Tepper, Roland R. Netz
Turkish Journal of Physics
We consider a generalized Langevin equation (GLE) in which the deterministic force, the mass and the friction kernel are configuration-dependent, i.e. general nonlinear functions of the reaction coordinate. We introduce a projection operator that allows for a self-consistent Markovian embedding of such GLEs. Self-consistency means that trajectories generated by the Markovian embedding are described by a GLE with the same configuration-dependent deterministic force, mass and friction kernel. Using the projection operator, we derive a closed-form relation between the parameters of the Markovian embedding Langevin equations and the parameters of the GLE. This is accomplished by applying the projection operator formalism …
Critical Dynamics In Biological Boolean Networks Follows From Symmetric Response To Input Genes, Hamza Çoban, Alkan Kabakçioğlu
Critical Dynamics In Biological Boolean Networks Follows From Symmetric Response To Input Genes, Hamza Çoban, Alkan Kabakçioğlu
Turkish Journal of Physics
A recent observation on an extensive collection of biological gene regulatory networks suggests that the regulatory dynamics is tuned to remain close to the order-chaos boundary in the Lyapunov sense [1]. We here investigate, from a mathematical perspective, the structural/functional constraints which give rise to such accumulation around criticality in these systems. While the role of canalizing functions in this respect is well established, we find that critical sensitivity to small input variations also follows from an over-abundance of symmetrical inputs, i.e. regulatory genes invoking identical or complementary responses on their common target. A random network ensemble constructed to have …
Quantum Kinetic Equation For Fermionic Fluids And Chiral Kinetic Theory, Ömer Faruk Dayi
Quantum Kinetic Equation For Fermionic Fluids And Chiral Kinetic Theory, Ömer Faruk Dayi
Turkish Journal of Physics
We first review how one can establish the quantum kinetic equation for fluids of spin-1/2 particles. Then we present the construction of the semiclassical relativistic chiral kinetic equation of the fluid in the presence of the external electromagnetic fields. We derive the resulting nonrelativistic chiral kinetic theory. We calculated the particle number current density and showed that chiral effects are correctly generated. Moreover, it satisfies the anomalous continuity equation.
Dissolution Of Alumina In Cryolite Melts: A Conceptual Dft Study, Ali̇met Sema Özen, Zehra Akdeni̇z
Dissolution Of Alumina In Cryolite Melts: A Conceptual Dft Study, Ali̇met Sema Özen, Zehra Akdeni̇z
Turkish Journal of Physics
Interactions between alumina and cryolite clusters were investigated using chemical reactivity descriptors based on Conceptual DFT such as global hardness, $\eta$, global softness, $S$, fukui functions, $f$, and local softness, $s$. Hard and Soft Acids and Bases (HSAB) Principle was applied for identifying clusters that are most likely to interact with alumina, Al$_2$O$_3$. Local reactivity descriptors were employed to predict the most probable regions of interaction within the cluster.
3d Self-Assemble Formation Of Molybdenum Disulfide (Mos2)-Doped Polyacrylamide (Paam) Composite Hydrogels, Sümeyye Durmaz, Ekrem Yildiz, Bengü Özuğur Uysal, Mehmet Önder Pekcan
3d Self-Assemble Formation Of Molybdenum Disulfide (Mos2)-Doped Polyacrylamide (Paam) Composite Hydrogels, Sümeyye Durmaz, Ekrem Yildiz, Bengü Özuğur Uysal, Mehmet Önder Pekcan
Turkish Journal of Physics
Polyacrylamide (PAAm), a renowned member of the hydrogel class, has many uses throughout a wide range of industrial processes, including water absorbed diapers, contact lenses, wastewater treatment, biomedical applications such as drug delivery vehicles and tissue engineering because of its physical stability, durability, flexibility easier shaping, and so on. PAAm also provides new functionalities after the incorporation of inorganic structures such as molybdenum disulfide (MoS2). During the copolymerization process, the transmittance of all samples reduced significantly after a particular time, referred to as the gel point. Microgels form a tree above the gel point as projected by Flory-Stockmayer …
Materials Anddevices For Integrated Room Temperature Quantum Spintronics, Mehmet Cengi̇z Onbaşli
Materials Anddevices For Integrated Room Temperature Quantum Spintronics, Mehmet Cengi̇z Onbaşli
Turkish Journal of Physics
Recent advances in precise stoichiometry control and high-resolution characterization of advanced spintronicmaterials allowed for the development of integrated spintronic devices, which might enable ultralow power magnonicdevices with multi-THz spin wave bandwidth and topologically protected spin wavefunctions that are robust for fabrica-tion imperfections. In addition, advances in microwave and optical excitation and control of quantum states in diamondnitrogen-vacancy systems (diamond-NV) allowed for ultrasensitive magnetometry and integrated quantum logic applica-tions. Here, an integrated spintronic garnet/diamond-NV quantum system has been reviewed and discussed for logic andmemory applications. After an overview of the recent advances in the growth and characterization of insulating magneticiron garnets, …
Hollow-Core Optical Fiber With Eight-Pointed Star Cladding Structure For Low-Loss Transmission In Telecom Bands, Mustafa Ordu
Hollow-Core Optical Fiber With Eight-Pointed Star Cladding Structure For Low-Loss Transmission In Telecom Bands, Mustafa Ordu
Turkish Journal of Physics
In this study, a novel negative curvature hollow-core fiber is proposed for low-loss transmission in thenear-infrared region. We numerically investigate the effect of the cladding structure, which is formed of concentricallyinterlaced squares, to the confinement losses using the finite element modelling. The design has eight cladding tubeswith nested elements placed to the outer edge of the tubes. The confinement losses of the interlaced square core fiberis calculated as low as 0.12 dB/km in the range of 1.3 to 1.65 $\mu$m. The loss profile of the noncircular core design is comparable with the circular cores, and have improved transmission performance at …
$\Psi(2s)$ And $J/\Psi$ Production In Pp Collisions At $\Sqrt{S}$ = 7, 8 And 13 Tev, Yasir Ali, Uzma Tabassam, Syed Uzair Ahmed Shah, Atif Arif, Mais Suleymanov, Zain Ul Abidin
$\Psi(2s)$ And $J/\Psi$ Production In Pp Collisions At $\Sqrt{S}$ = 7, 8 And 13 Tev, Yasir Ali, Uzma Tabassam, Syed Uzair Ahmed Shah, Atif Arif, Mais Suleymanov, Zain Ul Abidin
Turkish Journal of Physics
Proton-proton collision is an essential part of high energy physics, as it is a baseline for nucleus-nucleus and hadron-nucleus collisions. Quark-gluon plasma, an exotic state of strongly interacting QCD matter, is routinely produced in heavy nuclei high-energy collisions. Charmonium, the bound states of $c\bar{c}$ produced at the early stages of collisions, are nice probes to examine the properties of matter through which they pass. The differential cross-sections of inclusive $\psi(2S)$ in pp collisions at energies of $\sqrt{s}$ = 7, 8 and 13 TeV have been studied. PYTHIA 8.1 event generator is used for the simulation of data. The differential cross-section …
The Effect Of Sn Doping On The Electronic And Mechanical Properties Of Ti${}_{3}$Al${}_{1-X}$Sn${}_{X}$C${}_{2}$ Max Phases, Ayşenur Gencer, Aytaç Erki̇şi̇
The Effect Of Sn Doping On The Electronic And Mechanical Properties Of Ti${}_{3}$Al${}_{1-X}$Sn${}_{X}$C${}_{2}$ Max Phases, Ayşenur Gencer, Aytaç Erki̇şi̇
Turkish Journal of Physics
The phase pure synthesis of Ti${}_{3}$AlC${}_{2}$ MAX phase is quite difficult and some additives are required to get a phase pure Ti${}_{3}$AlC${}_{2}$ such as Sn. In this study, Sn doped Ti${}_{3}$AlC${}_{2}$ MAX phase has been investigated taking into account the experimental synthesis conditions where some Sn atoms could replace Al atoms in the structure. For this purpose, Ti${}_{3}$Al${}_{1-x}$Sn${}_{x}$C${}_{2}$ with x ranging from 0 to 1 with 0.1 interval has been studied using the first principles method and the results show that all compositions are thermodynamically stable. The electronic properties of these compositions have been studied using band filling theory in …
Hydrogen Sensing Properties Of Pd Loaded Tio$_2$ Nanorods, Serkan Büyükköse
Hydrogen Sensing Properties Of Pd Loaded Tio$_2$ Nanorods, Serkan Büyükköse
Turkish Journal of Physics
The hydrogen sensing performance of palladium (Pd) catalyst loaded TiO$_2$ nanorods based sensors were investigated. TiO$_2$ nanorods were grown on Al$_2$O$_3$ substrate by a facile hydrothermal process. TiO$_2$ nanorods (NRs) were functionalized with Pd metal by RF magnetron sputtering. Samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques for structural and morphological analysis. Sensor measurements toward H$_2$ and some volatile organic compounds (VOCs) such as acetone, ethanol, xylene and toluene were performed by varying gas concentrations at different temperatures. The sensors were found to exhibit excellent sensitivities towards different hydrogen concentrations ranging from 25 to 1000 …
Contrasting The Fuzzball And Wormhole Paradigms For Black Holes, Bin Guo, Marcel Hughes, Samir Mathur, Madhur Mehta
Contrasting The Fuzzball And Wormhole Paradigms For Black Holes, Bin Guo, Marcel Hughes, Samir Mathur, Madhur Mehta
Turkish Journal of Physics
We examine an interesting set of recent proposals describing a `wormhole paradigm' for black holes. These proposals require that in some effective variables, semiclassical low-energy dynamics emerges at the horizon. We prove the `effective small corrections theorem' to show that such an effective horizon behavior is not compatible with the requirement that the black hole radiate like a piece of coal as seen from outside. This theorem thus concretizes the fact that the proposals within the wormhole paradigm require some nonlocality linking the hole and its distant radiation. We try to illustrate various proposals for nonlocality by making simple bit …
An Improvement Of Current Driving And Electrical Conductivity Properties Incovetics, Mesut Atasoyu, Emi̇n Argun Oral, Mehmet Ertuğrul
An Improvement Of Current Driving And Electrical Conductivity Properties Incovetics, Mesut Atasoyu, Emi̇n Argun Oral, Mehmet Ertuğrul
Turkish Journal of Physics
Compared to pure Cu, Cu lattice retaining carbon atoms, called a covetic material, can have better electrical conductivity. Furthermore, the incorporation of carbon nanostructures into Cu-alloys could improve the mechanical properties of Cu-alloys. In the simulation study, we investigated Joule heating due to applied DC current on molten Cu metal concerning how to improve current density of covetic materials. In addition, we will discuss interfacial effects on covetic-metal electrodes to meet better current driving performance. The covetic composite excited at one electrode (width = 10 nm) has a higher current drive capability as a value of 3.54 $10^{7}$ $A /m^{2}$, …
A Simulation And Experimental Validation Of Third-Order Coma In Nodal Aberrationtheory With A Cassegrain Telescope, Özgür Karci
A Simulation And Experimental Validation Of Third-Order Coma In Nodal Aberrationtheory With A Cassegrain Telescope, Özgür Karci
Turkish Journal of Physics
This study presents a simulation and experimental validation of third-order coma in Nodal Aberration Theory (NAT) with a custom-designed Cassegrain system. The Cassegrain system uses a piezo-driven flexure tool to align the telescope's secondary mirror with respect to the primary mirror. This alignment mechanism is also used to misalign the telescope's secondary mirror to induce the intentional aberrations. The third-order Fringe Zernike coma (Z$_{7/8}$) was simulated utilizing the Cassegrain telescope's real ray-trace model (e.g., in Code V) and analyzed for both the telescope's nominal aligned and misaligned states. The simulated aberration of third-order coma was induced utilizing the secondary mirror …
Mixing Angles Between The Tetraquark States With Two Heavy Quarks Within Qcdsum Rules, Selçuk Bi̇lmi̇ş
Mixing Angles Between The Tetraquark States With Two Heavy Quarks Within Qcdsum Rules, Selçuk Bi̇lmi̇ş
Turkish Journal of Physics
LHCb collaboration has recently announced the observation of a doubly charmed tetraquark $T_{cc \bar{u} \bar{d}}^+$ state with spin parity $J^P = 1^+$. This exotic state can be explained as a molecular state with small binding energy. According to conventional quark model, both $D^+ D^{0\ast}$ and $(D^0 D^{+\ast})$ multiquark states are expected to have the same mass and flavor in the exact $SU(3)$ symmetry. However, since the quark masses are different, $SU(3) (SU(2))$ symmetry is violated; hence, the mass and flavor eigenstates do not coincide. The mass eigenstates can be represented as a linear combination of the flavor eigenstates, which is …
The Effect Of Two Different Substituted Atoms In Lithium Positions On The Structureof Garnet-Type Solid Electrolytes, Sevda Saran, Osman Murat Özkendi̇r, Ülfet Atav
The Effect Of Two Different Substituted Atoms In Lithium Positions On The Structureof Garnet-Type Solid Electrolytes, Sevda Saran, Osman Murat Özkendi̇r, Ülfet Atav
Turkish Journal of Physics
Li${}_{7}$La${}_{3}$Zr${}_{2}$O${}_{12}$ (LLZO), lithium lanthanum zirconate is a promising garnet-type solid electrolyte that is being intensively studied for solid-state lithium batteries. The properties of LLZO such as compatibility with the lithium electrode, stability, and ionic conductivity make them to be used in all solid-state batteries. Moreover, lithium ion concentration and distribution, doping different cations, chemical composition, and interaction between different dopants have remarkable effects on the ionic conduction of LLZO material. Herein, we investigate the solid electrolyte, Li${}_{6.4}$(Ga${}_{(1-y)}$In${}_{(y)}$)${}_{0.2}$La${}_{3}$Zr${}_{2}$O${}_{12}$ (y = 0.05, 0.10, 0.15, 0.20), by probing the influence of indium substitution to gallium sites at the same lithium concentration on the …
The Investigation Of The Complex Dielectric And Electric Modulus Of Al/Mg${}_{2}$Si/P-Si Schottky Diode And Its Ac Electrical Conductivity In A Wide Frequency Range, Ömer Sevgi̇li̇
Turkish Journal of Physics
The Al/Mg${}_{2}$Si/p-Si Schottky diode was fabricated using spin coating. The real ($\varepsilon$$\mathrm{\prime}$) and imaginary ($\varepsilon$$\mathrm{\prime}$$\mathrm{\prime}$) components of complex dielectric ($\varepsilon$*), the real (M$\mathrm{\prime}$) and imaginary (M$\mathrm{\prime}$$\mathrm{\prime}$) components of complex electric modulus (M*) and AC electrical conductivity ($\sigma$${}_{AC}$) of the fabricated Al/Mg${}_{2}$Si/p-Si Schottky diode (SD) were examined by using the impedance spectroscopy (IS) measurements in a wide frequency range of 1 kHz-1 MHz. The $\varepsilon$$\mathrm{\prime}$ and $\varepsilon$$\mathrm{\prime}$$\mathrm{\prime}$ were obtained using the value of measured capacitance and conductance while the values of dielectric loss tangent (tan$\delta$, M$\mathrm{\prime}$, M$\mathrm{\prime}$$\mathrm{\prime}$ and $\sigma$${}_{AC}$${}_{\ }$were obtained using the value of $\varepsilon$$\mathrm{\prime}$ and $\varepsilon$$\mathrm{\prime}$$\mathrm{\prime}$. While the values …
Sputtered 2d Transition Metal Dichalcogenides: From Growth To Deviceapplications, Merve Acar, Emre Gür
Sputtered 2d Transition Metal Dichalcogenides: From Growth To Deviceapplications, Merve Acar, Emre Gür
Turkish Journal of Physics
Starting from graphene, 2D layered materials family has been recently set up more than 100 different materials with variety of different class of materials such as semiconductors, metals, semimetals, superconductors. Among these materials, 2D semiconductors have found especial importance in the state of the art device applications compared to that of the current conventional devices such as (which material based for example Si based) field effect transistors (FETs) and photodetectors during the last two decades. This high potential in solid state devices is mostly revealed by the transition metal dichalcogenides (TMDCs) semiconductor materials such as MoS${}_{2}$, WS${}_{2}$, MoSe${}_{2}$ and WSe${}_{2}$. …
Investigating The Effect Of Self-Trapped Holes In The Current Gain Mechanism Of $ \Beta \Mathbf{-}{\Mathbf{Ga}}_{\Mathbf{2}}{\Mathbf{O}}_{\Mathbf{3}}$ Schottky Diode Photodetectors, Fati̇h Akyol
Turkish Journal of Physics
Monoclinic gallium oxide $(\beta\mathrm{-}{\mathrm{Ga}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{3}})$ has found great research interest in solar blind photodetector (SBP) applications due to its' bandgap $\mathrm{\sim}$4.85 eV and availability of high quality native crystal growth. Applications including missile guidance, flame detection, underwater/intersatellite communication and water purification systems require SBPs. $\beta\mathrm{-}{\mathrm{Ga}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{3}}$ SBPs with high responsivity values have been published indicating internal gain in these devices. The gain has been attributed to accumulation of self-trapped hole (STH) below Schottky metal which the lowers Schottky barrier in these devices based on some approximations rather than a proper device simulation. In this paper, technology computer-aided design (TCAD) simulation of $\beta\mathrm{-}{\mathrm{Ga}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{3}}$ …
Modeling And Parametric Study Of Dielectric Barrier Discharge In Pure Nitrogenat Atmospheric Pressure, Mohammed Habib Allah Lahouel, Djilali Benyoucef, Hocine Tebani
Modeling And Parametric Study Of Dielectric Barrier Discharge In Pure Nitrogenat Atmospheric Pressure, Mohammed Habib Allah Lahouel, Djilali Benyoucef, Hocine Tebani
Turkish Journal of Physics
This paper presents the one-dimensional simulation of the dielectric barrier discharge (DBD) in pure nitrogen at atmospheric pressure using a sinusoidal supply, within a reactor which consists of two parallel plates. For this purpose, significant reactions among the reactive species in the discharge are taken into account in this work by considering more than 70 reactions for 13 species. The model used in this study to describe the kinetics of the plasma species is the second order fluid model which consists in replacing the Boltzmann equation by these first three moments by using the drift-diffusion approximation for flux. In order …