Results in Physics最新文献

{"title":"Temperature and solute dependency of conventional {101¯1} twinning shear in Mg","authors":"Rui Liang ,&nbsp;Qun Zu ,&nbsp;Xiaotong Li ,&nbsp;Xin Yao ,&nbsp;Libin Zhao","doi":"10.1016/j.rinp.2025.108230","DOIUrl":"10.1016/j.rinp.2025.108230","url":null,"abstract":"<div><div>The shear deformation accommodated by twins is relevant to the Burgers vector of twinning dislocation (TD). However, according to the climbing image nudged elastic band (NEB) calculation, the edge 4-layer TDs which induce the conventional shear of {10<span><math><mover><mrow><mtext>1</mtext></mrow><mrow><mo>¯</mo></mrow></mover></math></span>1} twin experience a substantially higher energy barrier to nucleate, by contrast to the mixed 2-layer type. Here, the critical factors (temperature and solute) on 4-layer TD formation have been symmetrically discussed in Mg alloys via molecular dynamics (MD) simulations and theoretical analysis. The thermal driving force is requisite for 4-layer TD nucleation and movement, along with the higher temperature, the lower critical resolved shear stress (CRSS). Moreover, the solute softening or hardening is revealed to be sensitive to the element type, substituted position and concentration. Based on the activation energy barrier and CRSS, the solute softening by 4-layer TD is most obvious when the solutes lie on the second adjacent layer of TB for solute Y, followed by solute Li. The CRSS of TD nucleation decreases obviously with the increased solute proportion in Mg-Y alloy. This work manifests fundamental influencing factors on the {10<span><math><mover><mrow><mtext>1</mtext></mrow><mrow><mo>¯</mo></mrow></mover></math></span>1} TDs with edge characteristics, which could provide further guidance to operate the conventional shear in Mg and optimize the mechanical features of structural materials.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108230"},"PeriodicalIF":4.4,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical analysis of ionization and plasmonic phenomena on gold nanodopes upon laser pulse irradiation","authors":"K. Zsukovszki ,&nbsp;I. Papp","doi":"10.1016/j.rinp.2025.108198","DOIUrl":"10.1016/j.rinp.2025.108198","url":null,"abstract":"<div><div>We investigate the dynamics of plasmonic phenomena on gold nanoparticles and ionization under irradiation by short infrared pulses with intensities ∼4∙10¹⁵–4∙10¹⁷ W/cm². Numerical modeling of the interaction between laser radiation and the medium doped with nanoparticles (nanodopes) is conducted; various nanoparticles shapes are considered as resonant nanoantennas. A kinetic model is implemented with the EPOCH numerical software. The propagation of short pulses of infrared laser radiation of ≈0.1 ps duration in such doped matter and the dynamics of plasmon formation, its behavior in fields of various intensities and ionization are analyzed. The evolution of the electric field around dopes, of the plasmon and transfer of energy from wave to ions are studied. The momentum and energy of the resulting ionization products—protons, electrons and ions—are calculated. Plasmonic phenomena on nanoparticles of dipole, quadrupole, and spherical shapes and different sizes are explored. The comparative analysis is conducted for various shapes of dopes and various intensities of laser pulses, aiming to identify best resonating properties, plasmon life and increase of the energy of ionization products in strong laser fields.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108198"},"PeriodicalIF":4.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Terahertz hybrid metamaterial switcher between asymmetric transmission and linear dichroism","authors":"Abdul Jalal,&nbsp;Nannan Li,&nbsp;Yichun Chen,&nbsp;Hui Li","doi":"10.1016/j.rinp.2025.108229","DOIUrl":"10.1016/j.rinp.2025.108229","url":null,"abstract":"<div><div>This work introduces a hybrid metamaterial that operates as a highly switchable device, dynamically transitioning between asymmetric transmission (AT) and linear dichroism (LD) functionalities within the terahertz (THz) spectrum. Leveraging the phase-transition properties of vanadium dioxide (VO₂), which shifts from an insulating to a conductive metallic state at elevated temperatures, the proposed metamaterial enables tunable control over its optical characteristics. In the insulating phase, the structure achieves remarkable AT, with transmission coefficients reaching 0.95, supporting selective polarization conversion over an extensive frequency range (0.2–1.0 THz). Upon transitioning VO₂ to a metallic state, the AT effect diminishes significantly, allowing the device to exhibit LD by selectively absorbing linearly polarized THz waves. This reconfigurable behavior underscores the potential of phase-change materials to advance the field of active THz metamaterials, with applications in polarization manipulation, selective THz absorption, and tunable optoelectronic devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108229"},"PeriodicalIF":4.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical, structural, optical and thermal investigations of TeO2-modified borate glass for solid-state devices","authors":"A. Khan ,&nbsp;L. Shah ,&nbsp;M. Arsalan ,&nbsp;Ataullah ,&nbsp;I. Khan ,&nbsp;M. Shoaib ,&nbsp;S.A. Khattak ,&nbsp;Tanveer Ahmad ,&nbsp;P.M. Ismail ,&nbsp;G. Rooh ,&nbsp;I. Ullah","doi":"10.1016/j.rinp.2025.108213","DOIUrl":"10.1016/j.rinp.2025.108213","url":null,"abstract":"<div><div>The impact of varying TeO₂ content (0, 10, and 20 mol%) on the physical, optical, structural, and thermal properties was investigated for Eu₂O₃ doped borate glasses. Physical parameters such as sample density, molar volume, and ion concentration confirm the structural changes resulting from TeO₂ doping. The optical band gap, calculated from absorption spectra using Tauc’s plot, indicates the presence of localized states between the valence and conduction bands. X-ray diffraction (XRD) analyses confirm that the samples exhibit glass characteristics. FTIR studies demonstrate effective Te-O-Te linkages. The thermal properties, were assessed using differential thermal analysis (DTA), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). The DSC analysis revealed a computed △T of approximately 200 °C, indicating good thermal stability for the CNEBT glass. The crystallization onset and peak crystallization temperatures were observed to increase with the addition of TeO₂. The reduced glass transition temperature (T_rg) values suggest that internal crystallization is suppressed. TGA analysis confirmed weight loss attributed to the release of trapped solvents. The findings suggest that these glasses are suitable for use in high-temperature solid-state devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"73 ","pages":"Article 108213"},"PeriodicalIF":4.4,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MHD flow and heat transfer of Carreau nanofluid with slip effects, and modified Fourier–Fick’s law heat–mass fluxes over a paraboloid surface in porous medium","authors":"Tadesse Lamesse,&nbsp;Wubshet Ibrahim","doi":"10.1016/j.rinp.2025.108201","DOIUrl":"10.1016/j.rinp.2025.108201","url":null,"abstract":"<div><div>This study thoroughly analyzes the steady, three-dimensional boundary layer flow, heat transfer, and mass transfer of MHD Carreau nanofluid over a paraboloid surface embedded in a porous medium. It considers the integrated effects of Coriolis force, velocity slip, thermal radiation, Hall and ion slip, viscous dissipation, non-uniform heat source/sink, and chemical reactions on the flow. Main features of the analysis are the formulation of the Navier stokes equations, energy and concentration equations using the Cattaneo–Christov heat and mass flux models, rather than the classical Fourier’s law and Fick’s law, which is used to account for time relaxation effects. The governing nonlinear, coupled partial differential equations are converted into an ordinary differential system using similarity variables and then solved numerically using the finite element method. Sensitivity analysis using the response surface methodology exhibits the conditions for optimized heat transfer. The noteworthy findings are presented through graphical analyses of fluid flow parameters. The study reveals that the magnetic field slows fluid flow, while velocity increases with Hall and ion slip effects, mixed convection, concentration buoyancy parameters, and the Darcy number. Moreover, temperature increases with Brownian diffusion, the Eckert number, and radiation but decreases with a higher Prandtl number and thermal relaxation time. Moreover, as the Hall and ion slip parameters increase, the velocity profile also intensifies. The analysis reveals that the Prandtl number (Pr) is the dominant parameter, consistently exhibiting the highest Partial rank correlation coefficient(PRCC) value of 0.8650, emphasizing its crucial role in influencing the system’s behavior. Reliability is ensured through grid convergence analysis, and the numerical results were rigorously validated through detailed comparisons with previous studies and benchmark solutions. These findings are particularly relevant for energy systems, materials processing, and other industrial processes involving nanofluids in porous media, where precise control of thermal and fluid flow properties is crucial. Additionally, extending the study to other non-Newtonian fluids will broaden the applicability to a wider range of industrial applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108201"},"PeriodicalIF":4.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study of the couple stress on micropolar fluid flow saturating a porous medium in the presence of dust particles with hall current","authors":"Devilal Kumawat ,&nbsp;Devendar Kumar ,&nbsp;Mukesh Kumar Mahala ,&nbsp;Umar Ishtiaq ,&nbsp;Lipi Jain ,&nbsp;Ioan-Lucain Popa","doi":"10.1016/j.rinp.2025.108195","DOIUrl":"10.1016/j.rinp.2025.108195","url":null,"abstract":"<div><div>In this paper, the effect of couple stress on the micropolar fluid layer heated from below in the presence of dust particles through the porous medium with hall current has been investigated. The dispersion relation is derived using the normal mode technique, and the influences of porosity, magnetic field, dust particles, couple stress parameter, and micropolar parameters are analyzed both analytically and numerically. The numerical solutions are obtained using MATLAB. The impact of dust particles is a very important result of this model. These results have been compared with previous work, and they are in good agreement.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108195"},"PeriodicalIF":4.4,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of particle solidification growth evolution during slush hydrogen freeze-thaw process based on Phase Field-Lattice Boltzmann method","authors":"Fushou Xie ,&nbsp;Wan Guo ,&nbsp;Yang Yu ,&nbsp;Di Yang ,&nbsp;Yanzhong Li","doi":"10.1016/j.rinp.2025.108204","DOIUrl":"10.1016/j.rinp.2025.108204","url":null,"abstract":"<div><div>The remarkable performance exhibited by slush hydrogen makes it a promising choice for cryogenic propellants. The freeze–thaw method is the most commonly used method producing slush hydrogen due to its simplicity and reliability. However, the mechanism of preparing slush hydrogen by freeze–thaw method is not clear. Therefore, in order to figure out mesoscopic evolution law of hydrogen particles, this paper develops a two-dimensional(2D) Phase Field-Lattice Boltzmann Method (PF-LBM) to investigate the evolutionary mechanization of solidification growth of slush hydrogen particles during freezing and thawing in a stagnant flow field. The model is validated using the Lipton–Glicksman–Kurz (LGK) theoretical model for tip velocity, showing strong agreement with the predictions. The dendrite grows symmetrically during the freezing process. As the initial subcooling degree increases, the driving force of dendrite growth also rises, the size of the dendrite crystal increases and the speed of dendrite tip growth accelerates. During the melting process, the size of the dendrite decreases with time. This mesoscopic numerical study reveals the aging mechanisms of hydrogen dendrite. The heat flux leads to an increase in temperature, which affects the morphology of the solid–liquid interface. Additionally, the shape of the dendrite evolves from hexagonal to circular under the effect of heat diffusion, with the overall development tending towards the minimum of interfacial energy. This study explores the growth and aging mechanisms of slush hydrogen particles, which can provide theoretical guidance for the preparation of high-quality slush hydrogen.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108204"},"PeriodicalIF":4.4,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optoelectronic properties in CuO nanofibers, pure and doped with Mn","authors":"M. Piñón Espitia ,&nbsp;J.A. Duarte-Moller ,&nbsp;J.A. López-Gallardo ,&nbsp;M.T. Ochoa-Lara","doi":"10.1016/j.rinp.2025.108208","DOIUrl":"10.1016/j.rinp.2025.108208","url":null,"abstract":"<div><div>This research presents an optoelectronic study based on the dielectric function obtained from Kramers-Kronig analysis of CuO nanofibers (NFs), both pure (A) and 2.5 % Mn-doped (B), synthesized via the electrospinning method. The NFs were characterized using XRD and STEM, with a specific focus on analyzing valence electron energy loss (VEELS). This analysis was complemented by Cole-Cole diagrams to determine the band gap (E_g) and compare it with the EELS results. These properties reveal that the materials exhibit a semi-metallic nature due to the band gaps of 2.03 eV (A-NFs) and 2.85 eV (B-NFs), as well as negative conductivity in the dielectric function, and holes in the conduction band.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108208"},"PeriodicalIF":4.4,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chaotic analysis and a damped oscillator solitary wave structures to the generalized reaction Duffing model","authors":"Ghulam Hussain Tipu ,&nbsp;Waqas Ali Faridi ,&nbsp;Muhammad Bilal Riaz ,&nbsp;Fengping Yao ,&nbsp;Usman Younas ,&nbsp;Mubariz Garayev","doi":"10.1016/j.rinp.2025.108203","DOIUrl":"10.1016/j.rinp.2025.108203","url":null,"abstract":"<div><div>The aim of this research is to obtain soliton solutions for the generalized reaction Duffing model, a framework that generalizes many important models that illustrate key phenomena in science and engineering. In contrast to regular harmonic motion, this equation describes the motion of a damped oscillator with a more complex potential. We used the Kumar–Malik method in this work to obtain analytical solutions for the generalized reaction Duffing model, which is the first time this method has been used to extract soliton solutions in this particular setting. The equation is first reformulated as a nonlinear ordinary differential equation using traveling wave transformation. The approach proves particularly effective in handling nonlinear partial differential equations, yielding hyperbolic, Jacobi elliptic, trigonometric, and exponential function solutions under appropriate parameter constraints. A variety of innovative solutions emerge, including periodic wave solutions, dark compacton waves, kink waves, singular kink waves, bright solitons, breather waves, and singular-shaped solitons via the Kumar–Malik method. The solutions are then shown visually to demonstrate the wave behavior under various conditions. Our findings enhance the comprehension of the Duffing equation’s behavior across different physical contexts. The research uses extensive 2D and 3D graphic plot solutions of the proposed solutions for a better graphical understanding of the physical perimeters of solutions and proves the feasibility of the proposed method in solving complex nonlinear equations. The Chaotic analysis has also been discussed by perturbation term and initial conditions. It is important to note that the proposed methods are competent, credible, and interesting analytical tools for solving nonlinear partial differential equations. In addition, these solutions represent a valuable resource for the understanding of the complex behavior of physical systems, as well as for inspiring future research.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108203"},"PeriodicalIF":4.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of a computational model for variable-order fractional Brownian motion and solving associated stochastic integral equations using barycentric rational interpolants","authors":"Shiva Naserifar,&nbsp;Farshid Mirzaee,&nbsp;Erfan Solhi","doi":"10.1016/j.rinp.2025.108199","DOIUrl":"10.1016/j.rinp.2025.108199","url":null,"abstract":"<div><div>This study introduces a novel numerical method for approximating variable-order fractional Brownian motion, representing a significant advancement in the field of stochastic processes. The proposed method enhances the modeling accuracy of complex phenomena by accommodating variable-order Brownian motion. Additionally, it mitigates the computational challenges typically associated with modeling such processes. The innovative approach employs a newly developed and straightforward matrix-based algorithm grounded in B-spline functions, offering an efficient, accurate, and computationally simple technique for approximating variable-order fractional Brownian motion. Also, this study focuses on solving a novel class of integral equations driven by variable-order fractional Brownian motion. The proposed method uses the features of barycentric rational interpolants and the spectral method to provide a simple and accurate approach, thereby reducing the complexities associated with solving such integral equations. The convergence of the method is analyzed in detail, and its theoretical robustness is emphasized. Furthermore, several numerical experiments have been conducted, demonstrating the reliability and adaptability of the method in challenging stochastic models. All numerical results have been analyzed using statistical methods to ensure greater reliability and accuracy.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"72 ","pages":"Article 108199"},"PeriodicalIF":4.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}