Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Thin films (18)
- Optical properties (12)
- Solar cell (10)
- ZnO (10)
- Chalcogenide glasses (9)
-
- Thermodynamics (8)
- Cosmology (7)
- DFT (7)
- Density functional theory (7)
- Lattice parameter (7)
- Band gap (6)
- Elastic scattering (6)
- Electrical properties (6)
- Energy levels (6)
- Phase transition (6)
- Photoconductivity (6)
- Quantum well (6)
- Spray pyrolysis (6)
- X-ray diffraction (6)
- Bulk modulus (5)
- Cosmic ray (5)
- Decoherence (5)
- Dirac equation (5)
- Diurnal (5)
- Electrical conductivity (5)
- Entropy (5)
- Nanoparticles (5)
- Nuclear structure (5)
- Quantum dot (5)
- Schrödinger equation (5)
- Publication Year
Articles 91 - 120 of 1382
Full-Text Articles in Physical Sciences and Mathematics
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 $\beta\mathrm{-}{\mathrm{Ga}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{3}}$ …
Vacuum Polarization Energy Of The Kinks In The Sinh-Deformed Models, Ishmael Takyi, Benedict Barnes, Joseph Ackora-Prah
Vacuum Polarization Energy Of The Kinks In The Sinh-Deformed Models, Ishmael Takyi, Benedict Barnes, Joseph Ackora-Prah
Turkish Journal of Physics
We compute the one-loop quantum corrections to the kink energies of the sinh-deformed $\phi^{4}$ and $\varphi^{6}$ models in one space and one time dimensions. These models are constructed from the well-known polynomial $\phi^{4}$ and $\varphi^{6}$ models by a deformation procedure. We also compute the vacuum polarization energy to the non-polynomial function $U(\phi)=\frac{1}{4}(1-\sinh^{2}\phi)^{2}$. This potential approaches the $\phi^{4}$ model in the limit of small values of the scalar function. These energies are extracted from scattering data for fluctuations about the kink solutions. We show that for certain topological sectors with nonequivalent vacua the kink solutions of the sinh-deformed models are destabilized.
Deriving Weak Deflection Angle By Black Holes Or Wormholes Usinggauss-Bonnet Theorem, Yashmitha Kumaran, Ali̇ Övgün
Deriving Weak Deflection Angle By Black Holes Or Wormholes Usinggauss-Bonnet Theorem, Yashmitha Kumaran, Ali̇ Övgün
Turkish Journal of Physics
In this review, various researches on finding the bending angle of light deflected by a massive gravitating object which regard the Gauss-Bonnet theorem as the premise have been revised. Primarily, the Gibbons and Werner method is studied apropos of the gravitational lensing phenomenon in the weak field limits. Some exclusive instances are deliberated while calculating the deflection angle, beginning with the finite-distance corrections on nonasymptotically flat spacetimes. Effects of plasma medium is then inspected to observe its contribution to the deflection angle. Finally, the Jacobi metric is explored as an alternative method, only to arrive at similar results. All of …
Thermal Sensitivity From Current-Voltage-Measurement Temperaturecharacteristics In Au/N-Gaas Schottky Contacts, Abdulmeci̇t Turut
Thermal Sensitivity From Current-Voltage-Measurement Temperaturecharacteristics In Au/N-Gaas Schottky Contacts, Abdulmeci̇t Turut
Turkish Journal of Physics
We have measured the current?voltage-temperature (I-V-T) characteristics of the Au/n-GaAs/In Schottky barrier diodes (SBDs) to introduce their thermal sensitivity mechanism. The forward bias voltage variation with temperature (thermal sensitivity) of this SBDs has been studied at different constant current levels. The diode showed high and decisive thermal sensitivity up to a current level of 0.10 pA. The bias voltage-temperature (V-T) curves of the SBD have showed an excellent linear behavior at all current levels. The slope dV/dT = ? or the thermal sensitivity coefficient ? from the V-T curves decreased from 3.42 mV/K at 0.10 pA to 1.31 mV/K at …
$\Lambda_C \To \Lambda$ Form Factors In Lattice Qcd, Hüseyi̇n Bahti̇yar
$\Lambda_C \To \Lambda$ Form Factors In Lattice Qcd, Hüseyi̇n Bahti̇yar
Turkish Journal of Physics
Studying the semileptonic decays of charmed particles is prominent in testing the standard model of particle physics. Motivated by recent experimental progress in weak decays of the charm baryon sector, we study the form factors of $\Lambda_c \to \Lambda \ell^+ \nu$ transition on two flavor lattices. We compute two- and three-point functions, extract the dimensionless projected correlators, and combine them to form the Weinberg form factors. In the zero transferred momentum limit $f_1$, $f_2$ and $g_1$ form factors are found to be in agreement with other models, furthermore $f_3$ and $g_3$ form factors are comparable to model determinations. The $g_2$ …
Study Of The Average Transverse Sphericity In $Pp$ Collisions At Large Hadron Collider (Lhc) Energies, Uzma Tabassam, Safdar Abbas, Muhammad Anns Saif, Zain Ul Abidin, Yasir Ali
Study Of The Average Transverse Sphericity In $Pp$ Collisions At Large Hadron Collider (Lhc) Energies, Uzma Tabassam, Safdar Abbas, Muhammad Anns Saif, Zain Ul Abidin, Yasir Ali
Turkish Journal of Physics
In the current analysis we have reported the spectra of average transverse-sphericity as a function of multiplicity ($N_ch$) in $pp$ collisions for primary charged particles ($\pi^{+}, \pi^{-}, K^+, K^-, p$ and $\bar{p}$) in mid pseudo-rapidity of $ \eta < 0.8$ and in the kinematic transverse momentum range of $p_T > 0.5 \; GeV/c$ at $\sqrt{s_{NN}}$ = 0.9 and $7 \,TeV$. Two Monte Carlo event generators have been used for current analysis and the predictions of the model are compared to the results coming from the ALICE experiment based at the LHC. A detailed analysis has been carried out for three types of events (soft events, hard events and bulk events) categorized by …
Quasinormal Modes Of Charged Fermions In Linear Dilaton Black Hole Spacetime:Exact Frequencies, İzzet Sakalli, Gülni̇hal Tokgöz Hyusein
Quasinormal Modes Of Charged Fermions In Linear Dilaton Black Hole Spacetime:Exact Frequencies, İzzet Sakalli, Gülni̇hal Tokgöz Hyusein
Turkish Journal of Physics
: We study charged massless fermionic perturbations in the background of 4-dimensional linear dilaton black holes in Einstein-Maxwell-dilaton theory with double Liouville-type potentials. We present the analytical fermionic quasinormal modes, whose Dirac equations are solved in terms of hypergeometric functions. We also discuss the stability of these black holes under the charged fermionic perturbations.
Strategies To Reach Ultrahigh Capacitance Values For Supercapacitors: Materials Design, İpek Deni̇z Yildirim, Ameen Uddin Ammar, Merve Buldu, Feray Bakan Misirlioğlu, Emre Erdem
Strategies To Reach Ultrahigh Capacitance Values For Supercapacitors: Materials Design, İpek Deni̇z Yildirim, Ameen Uddin Ammar, Merve Buldu, Feray Bakan Misirlioğlu, Emre Erdem
Turkish Journal of Physics
This review paper highlights the recent developments in supercapacitors by pointing out the significance of appropriate electrode and device designs. We reported ten extremely high-performance supercapacitors with specific capacitance values among the highest available until now to the best of our knowledge. These state-of-the-art designs employing innovative electrode materials have been discussed along with their short descriptions. The supercapacitors collected here possess the most promising potential for facilitating next-generation systems in energy harvesting and storage. This review is just the surface that can help provide a pathway for supercapacitor research, which is still wide open for exploring and developing new …
Fano Enhancement Of Second Harmonic Field Via Dark-Bright Plasmon Coupling, Mehmet Günay
Fano Enhancement Of Second Harmonic Field Via Dark-Bright Plasmon Coupling, Mehmet Günay
Turkish Journal of Physics
Surface plasmon resonances, the coherent oscillation of free electrons, can concentrate incident field into small volumes much smaller than the incident wavelength. The intense fields at these hot spots enhance the light-matter interactions and may lead to the appearance of nonlinearity. Controlling such nonlinearities is significant for various practical applications. The existence of the long-lived particles in these hotspots may lead to creating Fano resonances in both linear and nonlinear fields. Here we demonstrate that by coupling plasmonic dark modes to the first and the generated second harmonic modes separately, one can gain control over both fields. We find that …
Modern Quantum Mechanics, Why We Need It, How To Use It?, Vahid Karimipour
Modern Quantum Mechanics, Why We Need It, How To Use It?, Vahid Karimipour
Turkish Journal of Physics
A new field of research centered on quantum science and technology is emerging. This rapidly developing field deals with the study and control of single quantum entities, i.e. atoms, ions, photons, which are no longer isolated but are parts of a larger system. Manipulation of these quantum entities forms the basis of modern quantum technology, from quantum computation to quantum communication and quantum sensing. One, therefore, needs to reconsider the basic concepts of state, evolution, and measurement for these so-called open quantum systems. This is a pedagogical review paper on the rudiments of modern quantum mechanics, which keeps citations to …
Interactions Between Densely Grafted Molten Polymer Brushes:Scaling Theories Versus Molecular Simulations, Aykut Erbaş
Interactions Between Densely Grafted Molten Polymer Brushes:Scaling Theories Versus Molecular Simulations, Aykut Erbaş
Turkish Journal of Physics
Using molecular dynamics simulations and scaling arguments, we analyzed the interactions between two identical molten polymer brushes intermediately and strongly compressed towards each other at melt conditions. The width of the overlap region, in which monomers of the linear chains composing the two brushes interact, increases as the polymer-grafted surfaces are brought closer. If two-brush coated surfaces are as close as the characteristics size of the grafted chains, the overlap region is directly controlled by intersurface distance. At intermediate compression, the width of the overlap region scales with the end-to-end size of chain sections within the overlap region. This result …
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 …
Chemical Synthesis Of Nonstoichiometric Nio${}_{X}$ Nanoparticles Using Differentnickel Salts And Application As An Additive Or Interface Layer Inphotovoltaic Devices, Fatma Pinar Choi
Turkish Journal of Physics
The stoichiometric nickel oxide is an insulator while it becomes a p-type semiconductor with the presence of divalent and trivalent states. Here nonstoichiometric nickel oxide nanoparticles (NiO${}_{x}$NPs) were synthesized via a chemical route using two different starter salts; nickel chloride hexahydrate and nickel nitrate hexahydrate. The nanoparticles were investigated by X-ray diffraction and transmission electron microscopy, scanning electron microscopy, to determine the crystal structure, morphology, and particle size. The effect of different nickel salts in the reaction and the formation of NiO${}_{x\ }$nanoparticles were observed for the first time in the literature. Because of the high uniformity and stability, nitrate-based …
Finite-Time Two-Spin Quantum Otto Engines:Shortcuts To Adiabaticity Vs. Irreversibility, Bariş Çakmak
Finite-Time Two-Spin Quantum Otto Engines:Shortcuts To Adiabaticity Vs. Irreversibility, Bariş Çakmak
Turkish Journal of Physics
We propose a quantum Otto cycle in a two spin-1/2 anisotropic XY model in a transverse external magnetic field. We first characterize the parameter regime that the working medium operates as an engine in the adiabatic regime. Then, we consider finite-time behavior of the engine with and without utilizing a shortcut to adiabaticity (STA) technique. STA schemes guarantee that the dynamics of a system follows the adiabatic path, at the expense of introducing an external control. We compare the performance of the nonadiabatic and STA engines for a fixed adiabatic efficiency but different parameters of the working medium. We observe …
Influence Of Annealing On Photoelectric Characteristics And Stability Of Elements Based On Si-Bi$_{2}$Te$_{3-X}$Se$_{X}$, Gurban Ahmadov
Influence Of Annealing On Photoelectric Characteristics And Stability Of Elements Based On Si-Bi$_{2}$Te$_{3-X}$Se$_{X}$, Gurban Ahmadov
Turkish Journal of Physics
In the manufacture of Bi$_{2}$Te$_{3-x}$Se$_{x}$-based elements using two sources of the deposited substance, they were initially annealed at a temperature of 150-200 \textdegree Ñ in a low vacuum. Heat treatment led to a slight increase in short circuit current and an increase in open circuit voltage. When the elements were heated in high vacuum, as well as in atmospheres of argon, nitrogen, hydrogen, helium and other gases, irreversible changes in the characteristics were not detected. Heat treatment of elements at a temperature of 100--150 \textdegree C in oxygen always improves their performance. It is assumed that annealing stimulates the growth …
Stable Anisotropic Single-Layer Of Rete$_2$: A First Principles Prediction, Mehmet Yağmurcukardeş
Stable Anisotropic Single-Layer Of Rete$_2$: A First Principles Prediction, Mehmet Yağmurcukardeş
Turkish Journal of Physics
In order to investigate the structural, vibrational, electronic, and mechanical features of single-layer ReTe$_2$ first-principles calculations are performed. Dynamical stability analyses reveal that single-layer ReTe$_2$ crystallize in a distorted phase while its 1H and 1T phases are dynamically unstable. Raman spectrum calculations show that single-layer distorted phase of ReTe$_2$ exhibits 18 Raman peaks similar to those of ReS$_2$ and ReSe$_2$. Electronically, single-layer ReTe$_2$ is shown to be an indirect gap semiconductor with a suitable band gap for optoelectronic applications. In addition, it is found that the formation of Re-units in the crystal induces anisotropic mechanical parameters. The in-plane stiffness and …
Influence Of Capping Layer On Skyrmion And Domain-Wall Formation In Co/Pt(111), Caner Değer
Influence Of Capping Layer On Skyrmion And Domain-Wall Formation In Co/Pt(111), Caner Değer
Turkish Journal of Physics
In order to realize skyrmion-based next-generation logic and memory devices, investigating the impact of materialparametersonskyrmionformationisessential. Cappingmagneticthinlayersforthepurposesofbothpreventing oxidation and/or enhancing crystal structure has an influence on chiral spin texture of the layer. In this paper, we have carried out a systematic computational study on magnetic skyrmion and domain-wall formation in which 2-atomic layer of Co, deposited on Pt(111) substrate and capped by certain (Ta, Ir, and Pt) 5d elements with various thicknesses. We have determined the magnetic topography of the structures by simulations based on DFT-calculated parameters; micromagnetic Dzyaloshinskii-Moriya interaction, exchange interaction, and magnetic anisotropy coefficients. We have revealed the influence …
Dispersion Management For Optical Parametric Amplifiers In Midinfrared, Hüseyi̇n Çankaya
Dispersion Management For Optical Parametric Amplifiers In Midinfrared, Hüseyi̇n Çankaya
Turkish Journal of Physics
Midinfrared (MIR) is an attractive spectral region for many applications ranging from vibrational spectroscopy to attosecond physics. However, in this spectral region, the dispersion management techniques are not as mature as the ones in the near-infrared (NIR) or visible, which is a key ingredient of ultrafast laser technology. In this manuscript,thetransferofdispersionmanagementschemesforopticalparametric(chirpedpulse)amplifiers(OP(CP)As) from NIR to MIR is discussed. Among those, a scheme based on Martinez-type grating stretcher and a bulk compressor is proposed and numerically analyzed. As a case study, the proposed scheme is applied numerically to a 2-µm pumped two-stageopticalparametricamplifier(OPA)systemat4.06µm. InthemodelOPAsystem,theseedpulsesaregenerated by white-continuum in bulk crystal and then amplified via …
Generating Velocity-Dependent Potential In All Partial Waves, Ashwini Kumar Behera, Ujjwal Laha, Jhasaketan Bhoi
Generating Velocity-Dependent Potential In All Partial Waves, Ashwini Kumar Behera, Ujjwal Laha, Jhasaketan Bhoi
Turkish Journal of Physics
Velocity/energy-dependent potential to a parent nonlocal interaction is constructed for all partial waves by Taylor series expansion method and the related s and p-wave phase shifts for N-N and α-N systems are computed by application of modified phase equation. Our phase shifts are in good agreement with standard data.
Field-Free Quantum-Spin-1/2 Xxz Model In Three-Dimensions: Phases, Phase Transitions, And Phase Diagrams By Renormalization Group Theory, Ozan Sabahatti̇n Sariyer
Field-Free Quantum-Spin-1/2 Xxz Model In Three-Dimensions: Phases, Phase Transitions, And Phase Diagrams By Renormalization Group Theory, Ozan Sabahatti̇n Sariyer
Turkish Journal of Physics
The field-free quantum-spin-1/2 XXZ model is studied in three-dimensions using renormalization group theory. We obtain global phase diagrams and critical properties. We identify zero-temperature quantum phase transitions at isotropic points, as well as long-range order below critical temperatures at all anisotropies. We show that the excitation spectrum is gapless in XY-like, and gapped in Ising-like anisotropy regimes. Besides, internal energy density, specific heat, nearest-neighbor entanglement measures and spin-spin correlations are obtained globally at all temperatures. Our numerical results cover the global range of anisotropy parameter, for both ferromagnetic and antiferromagnetic cases.
Tunneling Radiation And Quantum Entropy Of A Massive Gravity Black Hole, Gu Qiang Li, Yi Wen Zhuang
Tunneling Radiation And Quantum Entropy Of A Massive Gravity Black Hole, Gu Qiang Li, Yi Wen Zhuang
Turkish Journal of Physics
By using the Parikh-Wilczek (PW) quantum tunneling method, the Hawking radiation of black holes in massive gravity is investigated, the emission rate of particles and the black hole entropy are calculated. It is shown that the emission spectrum is not purely thermal, depends on the increment of the black hole entropy, consists with an accurate unitary theory and supports the standpoint of information conservation. Unlike other modified gravities, the entropy of the massive gravity black hole unexpectedly conforms to the area law just as that of Einstein gravity black hole.
Magnetic Properties Of Mn Doped Crystalline And Amorphous Ge Thin Films Grown On Si (111), İlknur Gündüz Aykaç, Aykut Can Önel, Burcu Toydemi̇r Yaşasun, Leyla Çolakerol Arslan
Magnetic Properties Of Mn Doped Crystalline And Amorphous Ge Thin Films Grown On Si (111), İlknur Gündüz Aykaç, Aykut Can Önel, Burcu Toydemi̇r Yaşasun, Leyla Çolakerol Arslan
Turkish Journal of Physics
We investigated the effects of crystalline order on the structural and magnetic properties of ultrathin Mndoped Ge thin films grown by thermal diffusion. The dopant motion which occurs during the annealing stage appears to differ considerably depending upon whether the Ge layer is in a crystalline or an amorphous state. The details of the temperature-dependent magnetization curves reveal that the a-MnGe and c-MnGe films show ferromagnetic property up to 300K and ~250K, respectively. Ferromagnetic Mn5 Ge3 thin film with weakly anisotropic in-plane magnetization is formed on amorphous Ge thin film, while weakly ferromagnetic Mn5 Gex Si3-x nanostructures are developed on …
Reactive Wetting Of Metallic/Ceramic (Al/Α-Al2 O3 ) Systems: A Parallel Moleculardynamics Simulation Study, Gürcan Aral
Reactive Wetting Of Metallic/Ceramic (Al/Α-Al2 O3 ) Systems: A Parallel Moleculardynamics Simulation Study, Gürcan Aral
Turkish Journal of Physics
The reactive wetting process of a flat solid alumina (α-Al2 O3) ceramic surface by metallic aluminum (Al) nanodroplets with different shapes (spherical, cylindrical, and layer) is studied using parallel molecular dynamics (MD) simulations based on a variable charge MD method, with focuses on heat transfer, mass transfer, and the structure of the reactive region at the Al/α-Al2 O3 interface. We find that the diffusion of oxygen (O) atoms from the substrate into the droplet leads to the formation of a continuous layer of reaction product at the interface. The diffusion length of oxygen atoms into the spherical Al droplet is …
Study Of Kno Scaling In The Emulsion Based Neutrino Experiments, Çağin Kamişcioğlu
Study Of Kno Scaling In The Emulsion Based Neutrino Experiments, Çağin Kamişcioğlu
Turkish Journal of Physics
KNO scaling was put forward by Koba-Nielsen-Olesen in 1972 and then tested by various experiments up to now. In this paper, the data on charged hadron multiplicity moments with KNO scaling of CHORUS and OPERA, both of them emulsion-based neutrino experiments, are compared. The results are given in detail which is very useful for tuning in MC event generators.