Results in Physics最新文献

{"title":"Thermal convection of hydromagnetic tangent hyperbolic fluid in spinning porous media cone of non-isothermal power-law model with radiation and heat gain","authors":"R.A. Kareem ,&nbsp;S.O. Salawu ,&nbsp;E.O. Fatunmbi ,&nbsp;A.M. Obalalu ,&nbsp;T.A. Yusuf","doi":"10.1016/j.rinp.2025.108157","DOIUrl":"10.1016/j.rinp.2025.108157","url":null,"abstract":"<div><div>The interest in enhancing industrial output and improving its efficiency has stimulated investigation into various fluid flow characteristics under diverse conditions and geometries. The performance of industrial products depends largely on the quality of the base materials. As such, this study examines the thermal convection of hydromagnetic flow of a tangent hyperbolic fluid within a spinning porous media cone, subjected to a non-isothermal power-law temperature distribution. The viscoelastic property and the nonlinear behavior of the fluid flow embodied the Cauchy stress tensor of the tangent hyperbolic model. The flow is influenced by gravity, porous saturated spinning cone medium, and transverse magnetic field, which stimulates internal heating. Without fluid material deformation, a mathematical differential model is developed to describe the momentum and energy flow dimensions. A comprehensive analysis of the transformed theoretical model is conducted using the Galerkin-weighted residual method in the presence of radiative heat transfer and heat gain. It was revealed from the study that, a rise in the magnetic field intensity inspires Joule heating, increasing the fluid heat distribution and influencing the boundary layer viscosity. Also, radiative heat transfer moderating prompts temperature profile due to convective heat gain. Hence, this study contributes to enhancing the understanding and control of thermal management in industrial applications, such as in cooling technologies for energy systems and rotating machinery.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108157"},"PeriodicalIF":4.4,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487634","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":"Sensitivity analysis for the anomalous tqγ couplings via γq→tγ subprocess in photon–proton collisions at the FCC-μp","authors":"Eda Alici","doi":"10.1016/j.rinp.2025.108167","DOIUrl":"10.1016/j.rinp.2025.108167","url":null,"abstract":"<div><div>In this study, we investigate anomalous Flavor-Changing Neutral Current (FCNC) interactions related to the top quark, particularly the <span><math><mrow><mi>t</mi><mo>→</mo><mi>q</mi><mi>γ</mi></mrow></math></span> transition, within the Standard Model Effective Field Theory (SMEFT) framework. These rare processes are largely suppressed in the Standard Model (SM) and are strong indicators of new physics scenarios beyond the SM. In our study, we have analyzed the cross sections of the <span><math><mrow><mi>γ</mi><mi>q</mi><mo>→</mo><mi>t</mi><mi>γ</mi></mrow></math></span> subprocess for two different center-of-mass energies, 17.3 TeV and 24.5 TeV, at the Future Circular Collider (FCC-<span><math><mi>μ</mi></math></span>p). Our results derived from simulations show that the branching ratios for these processes can be reduced to the order of <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>5</mn></mrow></msup></mrow></math></span>. In other words, the obtained values enhance sensitivity by approximately 30% and these represent a sensitivity improvement over the current experimental limits from CMS. Moreover, it has been demonstrated that higher center-of-mass energies and integrated luminosity values significantly enhance the discovery potential of these rare processes. Accordingly, the results indicate high-energy colliders such as FCC-<span><math><mi>μ</mi></math></span>p are of critical importance in the search for new physics and in the study of the role of the top quark in the context of flavor physics. As a result, by providing a comprehensive theoretical analysis, this study contributes to the importance of FCNC processes in the search for new physics beyond the Standard Model and will shed light on future experimental and phenomenological studies.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108167"},"PeriodicalIF":4.4,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474304","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":"Pressure-induced decomposition of Bi14WO24","authors":"E. Karaca ,&nbsp;D. Santamaria-Perez ,&nbsp;A. Otero-de-la-Roza ,&nbsp;R. Oliva ,&nbsp;K.S. Rao ,&nbsp;S.N. Achary ,&nbsp;C. Popescu ,&nbsp;D. Errandonea","doi":"10.1016/j.rinp.2025.108170","DOIUrl":"10.1016/j.rinp.2025.108170","url":null,"abstract":"<div><div>We present a study of the high-pressure behaviour Bi₁₄WO₂₄, a high oxide ion conductor member of the Bi₂O₃-WO₃ binary system. The tetragonal polymorph of Bi₁₄WO₂₄ was studied under high-pressure conditions using synchrotron powder X-ray diffraction. It was found that in contrast to isostructural Bi₁₄CrO₂₄ and Bi₁₄MoO₂₄ which experience a phase transition around 5 GPa, in our study Bi₁₄WO₂₄ apparently undergoes an irreversible chemical decomposition into Bi₂O₃ and WO₃ at 2.85(5) GPa. The pressure dependence of the unit-cell parameters of Bi₁₄WO₂₄ was also determined, and hence the linear compressibility along different axes and room-temperature pressure–volume equation of state were derived. Bulk modulus of tetragonal Bi₁₄WO₂₄ was found to be 49.8(2.6) GPa, and the linear compressibility of the two crystallographic axes, κ_a and κ_c were 6.94(2) 10⁻³ GPa⁻¹ and = 3.73(1) 10⁻³ GPa⁻¹, respectively. The pressure induced decomposition can be attributed to the favourable increasing density of the system to accommodate the pressure induced stress.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108170"},"PeriodicalIF":4.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143478812","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":"Discrete Legendre polynomials method to solve the coupled nonlinear Caputo–Hadamard fractional Ginzburg–Landau equations","authors":"M.H. Heydari ,&nbsp;D. Baleanu ,&nbsp;M. Bayram","doi":"10.1016/j.rinp.2025.108147","DOIUrl":"10.1016/j.rinp.2025.108147","url":null,"abstract":"<div><div>This paper employs the Caputo–Hadamard derivative to create the coupled nonlinear fractional Ginzburg–Landau equations. An orthonormal version of the discrete Legendre polynomials is utilized to generate a numerical strategy for this system. For this purpose, a fractional derivative matrix corresponding to these polynomials is obtained. The idea of the strategy is that by approximating the system’s solution by means of these polynomials, a system of algebraic equations is achieved, from the solution of which the solution of the main system is determined. To show the accuracy of the presented scheme, two examples are studied.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108147"},"PeriodicalIF":4.4,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474301","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":"Stopping power of surface magnetoplasmons with viscous and quantum effects in different two-dimensional targets","authors":"Ya Zhang ,&nbsp;Wei Jiang","doi":"10.1016/j.rinp.2025.108156","DOIUrl":"10.1016/j.rinp.2025.108156","url":null,"abstract":"<div><div>This study investigates viscous and quantum effects on the collective behavior of surface plasmons on various metals, such as the conventional surface magnetoplasmons and the acoustic surface magnetoplasmons, under the modulations of magnetic field and particle–surface interactions. We calculate wake potential, plasmon density, and stopping power based on a viscous quantum hydrodynamic model. It is observed that viscous effects tend to lower and broaden the peaks of stopping power, wake potential and plasmon density oscillations. Quantum effects modify the position and shape of these peaks, which might be essential for optimizing conditions in processes like materials engineering. The coupling of viscous and quantum effects significantly impacts the excitation of surface magnetoplasmons, with notable variations across different metals, indicating that material properties influence the plasmonic behavior.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108156"},"PeriodicalIF":4.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454580","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":"DFT + U + V approach to Fe3O4 (001): Insights into surface chemistry and Cu2+ adsorption","authors":"Nelson Naveas ,&nbsp;Francisco Javier Fernández-Alonso ,&nbsp;Ruth Pulido ,&nbsp;Raúl J. Martin-Palma ,&nbsp;Jacobo Hernández-Montelongo ,&nbsp;Célia T. Sousa ,&nbsp;Miguel Manso-Silván","doi":"10.1016/j.rinp.2025.108158","DOIUrl":"10.1016/j.rinp.2025.108158","url":null,"abstract":"<div><div>In this report, a first-principles investigation of the Fe₃O₄ (001) surface using Density Functional Theory (DFT) with Hubbard U and inter-site V corrections (DFT + U + V) is presented. By considering the DFT and DFT + U approaches, a semi-metallic nature is observed, while by applying the DFT + U + V method, a pronounced gap is created at the Fermi level, in agreement with the insulating nature of the surface. Furthermore, Cu²⁺ adsorption simulations were performed, revealing that the incorporation of both U and V parameters is crucial for accurately modeling the adsorption processes, which are essential for catalysis and environmental applications. These findings highlight the importance of considering both on-site and inter-site electron interactions to achieve a comprehensive understanding of the surface chemistry of transition metal oxides, with an impact on applications of the Fe₃O₄ (001) surface chemistry.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108158"},"PeriodicalIF":4.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454578","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":"Enhancing methylene blue degradation via Mn, Co, and Al doped organic-ligand-stabilized ZnO nanoparticles: Experimental and DFT insights","authors":"Imran Ullah ,&nbsp;Reinhard B Neder ,&nbsp;Muhammad Irfan khan ,&nbsp;Suriati Sufian ,&nbsp;Huma Parwaz","doi":"10.1016/j.rinp.2025.108166","DOIUrl":"10.1016/j.rinp.2025.108166","url":null,"abstract":"<div><div>Organic dyes contaminate a huge amount of water annually, resulting in potential risks for aquatic ecosystems. The removal of such contamination is addressed in this study by synthesizing highly stabilized manganese (Mn), cobalt (Co), and aluminum (Al)-doped zinc oxide (ZnO) ultra-small (US) nanoparticles (NPs) via the sol–gel approach and characterized through various characterization techniques. XRD confirmed single-phase crystallization in all samples, with crystallite/nanoparticle sizes ranging from 3 nm to 10 nm. A broad absorbance peak in the UV–Vis spectra signified size distribution, with the bandgap ranging from 3.02 to 3.06 eV for ZnO and reduced to 2.98 eV upon Co-doping. Density Functional Theory (DFT) calculations revealed improved structural and mechanical stability upon Co-doping and citrate (cit) capping. Furthermore, Co-doping and cit-capping improved the chemical reactivity of ZnO NPs. The cit-decorated 3 % Mn-doped ZnO photocatalyst improved the degradation efficiency from 27.02 mg/g to 29.63 mg/g. The 5 % Co-doped ZnO photocatalyst (cit-capped) exhibited 8.50 % higher dye degradation compared to<!--> <!-->ZnO-cit. Among dmlt-capped photocatalysts (ZnO), 5 % Al-doped remain an excellent photocatalyst and degrade 95.49 % dye in 180 min. DFT study revealed that cit-capping and Co-doping improve the light absorption of the photocatalysts, with an onset shift from 0.75 eV (ZnO) to 0.10 eV (ZnO cit). Co-incorporation into the ZnO lattice introduces an additional absorption peak in the visible range. Moreover, cit-capping also broadens the absorption range. Degradation kinetics of MB dye follow pseudo-first-order kinetics with R-squared values ranging from 0.90 to 0.99. Further improvements are possible through optimization of dopant levels (%), dye concentration, pH, and temperature.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108166"},"PeriodicalIF":4.4,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487584","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":"Modulated magnetic and piezoresponse phase by applied electric field in 2D layered materials at room temperature","authors":"Joong Yeon Lim ,&nbsp;Seonghwan Kim ,&nbsp;Young-Seong Kim","doi":"10.1016/j.rinp.2025.108162","DOIUrl":"10.1016/j.rinp.2025.108162","url":null,"abstract":"<div><div>A hybrid perovskite material with a Two-dimensional (2D) layered (C₄H₉NH₃)₂PbIBr₃ crystal structure is presented that exhibits magnetoelectricity and piezoelectricity coupling properties at room temperature. The interaction between ferromagnetism and piezoelectricity was achieved by harmonizing their respective ferroic orders. 2D layered organic–inorganic hybrid perovskites demonstrated controlled multifunctional ferroic attributes, with each characteristic established. The magnetic and piezoresponse phase rotation was controlled by modulating the electric-field strength using the magnetoelectricity and piezoelectricity. The responsive and phase-controllable behavior of ferromagnetism and piezoelectricity in 2D hybrid perovskites was effectively managed by an external electric field induced by the coupling between ferroic orders at room temperature. This discovery offers a promising avenue for future research on hybrid perovskites with novel 2D layered-crystal structure.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108162"},"PeriodicalIF":4.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445041","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":"Period-doubling route to chaos in perturbed period-one nonlinear dynamics","authors":"Mohammad AlMulla","doi":"10.1016/j.rinp.2025.108164","DOIUrl":"10.1016/j.rinp.2025.108164","url":null,"abstract":"<div><div>An all-optical method is proposed for destabilizing the period-one (P1) nonlinear dynamic state using a system of three cascaded semiconductor lasers across two optical injection stages. Leveraging the P1 dynamic state in the first optical injection stage as a tunable microwave oscillator, this approach generates broadband chaotic dynamics without the need for high-frequency microwave sources. By tuning the second injection stage such that the lower oscillation sideband of the injecting P1 state is offset by a few gigahertz from the injection-shifted cavity resonance of the second laser operating also in the P1 dynamic state, the P1 state is destabilized into a chaotic dynamic state. The resulting dynamics are influenced by both the power and frequency of the lower oscillation sideband of the injecting P1 state, leading to a cascade of period-doubling bifurcations that culminate into chaos. The induced chaos exhibits broad standard and effective bandwidths exceeding 30 GHz and 15 GHz, respectively, highlighting the potential of this approach for applications in broadband chaotic systems.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108164"},"PeriodicalIF":4.4,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474305","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":"Interplay between charge-density-waves, disorder, and superconductivity in transition metal dichalcogenides","authors":"Aya Ali ,&nbsp;Fatima Alshaali ,&nbsp;Mejd Almheiri ,&nbsp;Mahmoud Abdel-Hafiez","doi":"10.1016/j.rinp.2025.108154","DOIUrl":"10.1016/j.rinp.2025.108154","url":null,"abstract":"<div><div>Transition metal dichalcogenides (TMDs) are a fascinating class of materials known for their various electronic properties and potential applications in nanoelectronics, quantum computing, and energy storage. This review explores the intricate interplay between charge-density waves (CDWs), disorder, and superconductivity in TMDs, highlighting the significant advances made in understanding these phenomena over the past decades. We discuss how doping and external pressure modulate the electronic structure and phase transitions in TMDs, providing insight into the mechanisms driving these changes. The dual role of CDWs and disorder in promoting or suppressing superconductivity is examined, with a focus on the conditions under which superconductivity emerges or is enhanced. This review also covers the latest experimental techniques and theoretical models used to study these materials, emphasizing the synergy between experimental observations and theoretical predictions. The review will present detailed Pressure–Temperature (P–T) Phase Diagrams of TMDs, with a specific focus on three key families: MSe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, MS<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, and MTe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, where M represents the transition metal. Each subsection examines how external pressure influences the phase transitions and electronic structures of these materials, providing insights into the pressure-induced modulation of CDWs and superconductivity. Following this, the Doping-Induced Enhancement of Superconductivity in TMDs section investigates how chemical doping can alter the superconducting properties of TMDs. Subsections dedicated to MSe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, MS<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, and MTe<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> delve into the various doping strategies employed, the resulting changes in electronic behavior, and the implications for enhancing superconductivity. By examining past and recent findings, this paper aims to provide a comprehensive understanding of the dynamic relationships between CDWs, disorder, and superconductivity in TMDs, paving the way for future research and technological advancements in this rapidly evolving field.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108154"},"PeriodicalIF":4.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454579","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}