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Origin of the Non-Zero-Volt Peak in Diode Current–Voltage Characteristics of Some Diodes 某些二极管电流-电压特性中非零伏峰值的来源
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601594
M. A. Redjimi, N. Sengouga
{"title":"Origin of the Non-Zero-Volt Peak in Diode Current–Voltage Characteristics of Some Diodes","authors":"M. A. Redjimi,&nbsp;N. Sengouga","doi":"10.1134/S1063776125601594","DOIUrl":"10.1134/S1063776125601594","url":null,"abstract":"<p>Diodes are the basic building blocks of electronic circuits. They are mainly characterized by their current-voltage relation. This relation shows a peculiar behavior, in real-world diodes. That is a non-zero voltage peak in the semi-logarithmic scale in the current. In this brief, a numerical simulation is used to elucidate this phenomenon. It was found that it is due to the different materials used in the diode. If the diode is a homojunction then the peak appears at zero applied voltage while it is displaced if the diode is a Schottky barrier or a heterojunction. This is just an initial work; it requires wider consideration for example narrow band heterojunctions and other diodes made from different semiconductors.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"171 - 175"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Soliton Dynamics in Fractional and q-Deformed Sinh-Gordon Models: A Unified Numerical Framework 分数和q-变形Sinh-Gordon模型中的孤子动力学：一个统一的数值框架
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601636
N. Üzar
{"title":"Soliton Dynamics in Fractional and q-Deformed Sinh-Gordon Models: A Unified Numerical Framework","authors":"N. Üzar","doi":"10.1134/S1063776125601636","DOIUrl":"10.1134/S1063776125601636","url":null,"abstract":"<p>This study presents a comparative numerical analysis of four variants of the nonlinear sinh-Gordon equation: the classical, <i>q</i>-deformed, time-fractional, and fractional <i>q</i>-deformed models. These formulations incorporate memory effects via Caputo fractional derivatives and structural asymmetries through <i>q</i>-deformation, providing a unified framework to explore soliton dynamics in complex media. All models are solved using the finite difference method under consistent initial and boundary conditions, enabling direct comparison of their spatiotemporal behavior, full width at half maximum (FWHM), and total energy. Small values of the fractional order (α) and deformation parameter (<i>q</i>) lead to delocalized, oscillatory waveforms due to dominant memory and asymmetry effects. Larger values restore localized kink-type solitons, often accompanied by low-amplitude edge oscillations attributed to internal mode excitations or residual radiation. For <i>q</i> in the range 0.0001–0.5, significant waveform asymmetries emerge, resulting in notable differences in amplitude and FWHM between positive and negative lobes. As <i>q</i> approaches 1, the solution converges to the classical case. In the time-fractional model, the highest energy and FWHM values occur at α = 0.1, both decreasing as α increases toward 1. For α &gt; 1, the solution gradually recovers classical behavior, fully restored at α = 2. A unified initial condition is introduced and applied consistently across all models, enabling reliable benchmarking and revealing internal mode dynamics. These findings provide new insights into nonlinear wave propagation and energy localization in media with memory and structural deformation, demonstrating that α and <i>q</i> act as effective control parameters for soliton structure and stability.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"188 - 205"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electromagnetic Corrections in Two-Photon Decays of π0, η, and η' Mesons π0、η和η’介子双光子衰减中的电磁修正
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601582
A. A. Osipov
{"title":"Electromagnetic Corrections in Two-Photon Decays of π0, η, and η' Mesons","authors":"A. A. Osipov","doi":"10.1134/S1063776125601582","DOIUrl":"10.1134/S1063776125601582","url":null,"abstract":"<p>The role of electromagnetic corrections in anomalous decays <span>({{pi }^{0}},eta ,eta ' to gamma gamma )</span> is investigated. To obtain the amplitudes of these processes, effective Lagrangian of the <span>(1{text{/}}{{N}_{c}})</span> chiral perturbation theory is used; analysis is confined to the vertices appearing at the first two steps of the <span>(1{text{/}}{{N}_{c}})</span> expansion. It is shown that the inclusion of electromagnetic interactions leads to corrections ensuring full agreement between theoretical estimates of decay widths and experimental data. The effects caused by isospin and unitary symmetry breaking are considered in detail against the general background of predominance of contributions from non-Abelian and gluon anomalies.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"162 - 170"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Augmented Spectroscopic Properties of Liquid Crystal Dispersed with Nanoparticles 纳米颗粒分散液晶的增广光谱特性
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601211
D. Bhargava, Ch. R. Sh. Kumar, P. Pardhasaradhi, R. K. Ramachandra, G. Giridhar, D. Mandali, R. K. N. R. Manepalli
{"title":"Augmented Spectroscopic Properties of Liquid Crystal Dispersed with Nanoparticles","authors":"D. Bhargava,&nbsp;Ch. R. Sh. Kumar,&nbsp;P. Pardhasaradhi,&nbsp;R. K. Ramachandra,&nbsp;G. Giridhar,&nbsp;D. Mandali,&nbsp;R. K. N. R. Manepalli","doi":"10.1134/S1063776125601211","DOIUrl":"10.1134/S1063776125601211","url":null,"abstract":"<p>Dispersion of nanoparticles is widely acceptable method for augmenting spectroscopic properties and intrinsic compressibility of liquid crystals. In the present study zinc oxide nanoparticles were synthesized with custard apple leaves as reducing agent and dispersed in liquid crystal at various concentrations. Confirmation of size of particles as single crystal, the approximate size being 27.87 nm from X-ray spectra. These resulting zinc oxide nanoparticles (NP) were dispersed in different weight proportions to obtain liquid crystal nanocomposite (LCxNP) with <i>x</i> = 0.5, 0.75, and 1 wt %. Now the powdered LCxNP were characterized with suitable methods for extended spectroscopic properties viz optical and thermal properties. Observed parameters of experimental studies convinced significantly with reduced optical band gap, increased refractive index, dielectric constant due to delocalized states. Consequently, these delocalized states are responsible for dipole-induced dipole interactions resulting in increased molecular interactions responsible for crystallite size with unaltered texture and enthalpy allow the material as more efficient polarizable material. Formation of LCxNP is confirmed with changes in stretching and bending vibrations confirming formation bonding with increased absorption. It’s evident from the studies that higher concentration of nanoparticles has a significant impact on spectroscopic properties due to increased dipole-induced dipole interactions and occurrence of delocalized states that is crucial for the development of advanced liquid crystal-based devices with tailored properties.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"133 - 143"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electron Beam Excites Multiscale Instabilities in Piezoelectric Semiconductor Plasmas 电子束激发压电半导体等离子体的多尺度不稳定性
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601533
A. Sohail, A. Rasheed, S. A. Raza, B. Ramzan, F. Areeb, M. Jamil
{"title":"Electron Beam Excites Multiscale Instabilities in Piezoelectric Semiconductor Plasmas","authors":"A. Sohail,&nbsp;A. Rasheed,&nbsp;S. A. Raza,&nbsp;B. Ramzan,&nbsp;F. Areeb,&nbsp;M. Jamil","doi":"10.1134/S1063776125601533","DOIUrl":"10.1134/S1063776125601533","url":null,"abstract":"<p>An analytical and numerical study of a beam-driven multi-scale phonon-plasmon coupled mode propagating in piezoelectric semiconductor quantum plasmas is presented. Lattice shear excites phonons, and an external electron beam excites plasmons that in turn couple and become unstable. The coupled mode may resonate at different time scales depending on the corresponding frequency of the plasma species. The lattice equations, along with the quantum hydrodynamic model, are employed for dispersive analysis of the shear phonon-plasmon coupled mode. The dispersive features are elaborated in depth by numerical studies and depicted in a graphical representation. The effects of all plasma parameters on instability behavior are carefully observed in magnetically quantized GaAs semiconductor plasmas. This work seeks its modern applications in acoustic wave resonators and amplifiers, piezoelectric semiconductor devices, nanophotonics, nanomaterials, and nanotubes that have the capability to manipulate electrical signals.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"176 - 187"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147338667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exact Solutions for Optical Solitons in the Dimensionless Time-Dependent Paraxial Equation via Two Analytical Approaches 无因次时傍轴方程中光孤子的两种解析解
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S106377612560151X
S. S. Mahmood, M. A. S. Murad
{"title":"Exact Solutions for Optical Solitons in the Dimensionless Time-Dependent Paraxial Equation via Two Analytical Approaches","authors":"S. S. Mahmood,&nbsp;M. A. S. Murad","doi":"10.1134/S106377612560151X","DOIUrl":"10.1134/S106377612560151X","url":null,"abstract":"<p>In this study, we investigate the dimensionless time-dependent paraxial equation by two powerful analytical methods: the generalized exponential rational function method (GERFM) and the <span>(left( {m + frac{1}{{G'}}} right))</span>-expansion method. The GERFM method gives us six distinct solution sets which include bright, dark, singular, mixed, and kink-type soliton solutions expressed in terms of hyperbolic functions such as <span>({text{csch}}(xi ))</span>, <span>({text{sech}}(xi ))</span>, <span>({text{tanh}}(xi ))</span>, and <span>({text{coth}}(xi ))</span>. The <span>(left( {m + frac{1}{{G'}}} right))</span>-expansion method provides additional solution forms involving exponential rational functions. We show these solutions through 2D and 3D graphical representations, demonstrating their temporal stability and localization properties over time evolution. The bright solitons maintain their symmetric peak structure, dark solitons exhibit stable trough formations, and mixed solitons combine multiple wave components coherently during propagation. The stability analysis confirms that all obtained soliton solutions preserve their shape and amplitude characteristics under time evolution, indicating their physical robustness. This model is useful for applications in nonlinear fiber optics, optical communication systems, supercontinuum generation, plasma wave propagation, and nonlinear waveguide design. The results provide valuable insights for understanding complex wave phenomena in dispersive nonlinear media and offer practical applications for future photonic technologies and optical signal processing systems.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"144 - 155"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Cobalt Oxide Solar Cell 氧化钴太阳能电池的合成
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2026-02-13 DOI: 10.1134/S1063776125601417
A. Z. Manshad
{"title":"Synthesis of Cobalt Oxide Solar Cell","authors":"A. Z. Manshad","doi":"10.1134/S1063776125601417","DOIUrl":"10.1134/S1063776125601417","url":null,"abstract":"<p>In this paper, we report the successful synthesis of cobalt oxide solar cell and characterized a high-efficiency cobalt oxide (Co<sub>3</sub>O<sub>4</sub>) solar cell. The solar cell was constructed using the spin coating technique with a power conversion efficiency of 18.71% under 1-sun illumination (100 mW/cm<sup>2</sup>), with an open-circuit voltage (<i>V</i><sub>oc</sub>) of 0.544 V and a short-circuit current density (<i>J</i><sub>sc</sub>) of 151.21 mA/cm<sup>2</sup>. These results highlight the potential of using readily available materials and simple deposition techniques to achieve efficient Co<sub>3</sub>O<sub>4</sub>-based solar cells.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 4-6","pages":"156 - 161"},"PeriodicalIF":0.8,"publicationDate":"2026-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147339158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stability of Networks of Heterogeneous Stuart–Landau Oscillators with Nonlinear Global Coupling 具有非线性全局耦合的非均质Stuart-Landau振子网络的稳定性
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2025-12-18 DOI: 10.1134/S1063776125600862
R.-S. Kim, J.-S. Kang, Ch.-U. Choe
{"title":"Stability of Networks of Heterogeneous Stuart–Landau Oscillators with Nonlinear Global Coupling","authors":"R.-S. Kim,&nbsp;J.-S. Kang,&nbsp;Ch.-U. Choe","doi":"10.1134/S1063776125600862","DOIUrl":"10.1134/S1063776125600862","url":null,"abstract":"<p>We suggest a system of heterogeneous limit-cycle oscillators with a nonlinear global coupling that is equivalent to the Kuramoto phase model in its long-term dynamics. The continuum limit of our system yields directly the well-known equation for the Ott-Antonsen ansatz in a consistent way, confirming implicitly the validity of the ansatz assumption. For a Lorentzian frequency distribution of the individual oscillators, in particular, the nonlinear evolution of the order parameter is determined simply by a low-dimensional dynamical system, without assuming the Ott-Antonsen ansatz, and we present a complete spectrum analysis for the linear stability. For arbitrary frequency distributions, we derive the characteristic equations for the discrete spectrum as well as the continuous spectrum for the partially synchronized state. Possible extensions to variants of the Kuramoto model and linearly coupled oscillators are discussed.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 1-3","pages":"41 - 53"},"PeriodicalIF":0.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical Investigation of Gibbs Free Energy, Enthalpy, and Specific Heat of Nitrogen Using Pseudoharmonic Plus Kratzer Potential 用赝调和和克拉泽势对氮的吉布斯自由能、焓和比热的理论研究
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2025-12-18 DOI: 10.1134/S1063776125601132
A. Ghanbari
{"title":"Theoretical Investigation of Gibbs Free Energy, Enthalpy, and Specific Heat of Nitrogen Using Pseudoharmonic Plus Kratzer Potential","authors":"A. Ghanbari","doi":"10.1134/S1063776125601132","DOIUrl":"10.1134/S1063776125601132","url":null,"abstract":"<p>This paper theoretically investigated the thermodynamic properties of nitrogen diatomic molecule using pseudo harmonic plus Kratzer potential (PKP). For this goal, the Schrödinger equation (SE) have solved with the combined potentials applying the series expansion formalism and have obtained energy eigenvalues for the N<sub>2</sub>. Using determined eigenvalues, the partition function and thermodynamic properties such as mean energy, specific heat, Gibbs free energy and enthalpy have obtained and the calculated results have compared with experimental data. The comparisons reveal that there is a good agreement between them. Also, average deviations of the determined results and experimental data have obtained.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 1-3","pages":"71 - 79"},"PeriodicalIF":0.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Atomic and Electronic Structure of Defect Ni Complexes and Oxygen Vacancies in HfO2 and Their Influence on Charge Transport in Memristors HfO2中缺陷Ni配合物和氧空位的原子电子结构及其对忆阻器中电荷输运的影响
IF 0.8 4区 物理与天体物理
Journal of Experimental and Theoretical Physics Pub Date : 2025-12-18 DOI: 10.1134/S106377612560134X
T. V. Perevalov, D. R. Islamov, A. A. Chernov
{"title":"Atomic and Electronic Structure of Defect Ni Complexes and Oxygen Vacancies in HfO2 and Their Influence on Charge Transport in Memristors","authors":"T. V. Perevalov,&nbsp;D. R. Islamov,&nbsp;A. A. Chernov","doi":"10.1134/S106377612560134X","DOIUrl":"10.1134/S106377612560134X","url":null,"abstract":"<p>This study is devoted to theoretical investigation of the atomic and electronic structure of defect complexes formed by nickel atoms and oxygen vacancies in HfO<sub>2</sub> using the density functional theory. We consider Ni in the interstitial position as well in the Hf substitution position. It is shown that Ni facilitates the formation of oxygen vacancies and their clusterization. The localization of charge carriers occurs predominantly at oxygen vacancies, while nickel produces an indirect effect on the charge transport. Complexes of nickel and oxygen vacancies do not form shallow traps. It is shown that filamentary structures in the form of continuous chains in HfO<sub>2</sub> do not exhibit metal-type conductivity.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"141 1-3","pages":"113 - 119"},"PeriodicalIF":0.8,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146016076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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