Results in Physics最新文献

{"title":"Effective modulation of electric field distribution through microstructuring of indium tin oxide films","authors":"Jialin Ji ,&nbsp;Kangqi Yi","doi":"10.1016/j.rinp.2025.108122","DOIUrl":"10.1016/j.rinp.2025.108122","url":null,"abstract":"<div><div>This study proposes a transparent conductive thin film microstructure capable of effectively modulating the optical properties of the film. Simulation results show that grating-structured indium tin oxide (ITO) films can modulate the surface electric field distribution by adjusting the structural parameters of the grating. This modulation enables a strong electric field to extend to the air side without compromising the integrity of the transparent conductive layer, thereby enhancing resistance to laser-induced damage. Increasing the grating period from 336 nm to 408 nm shifts the surface plasmon resonance wavelength from 506 nm to 600 nm. Therefore, the period of ITO grating exhibits the characteristic of wavelength selection. The optical properties of ITO gratings are also sensitive to film thickness and filling factor. Simulations of other microstructures confirm similar modulation effects. These results provide a theoretical basis for the design and preparation of transparent conductive thin films that meet the demands of high-power, high-throughput liquid crystal optical devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108122"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150224","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":"Breather and solitonic behavior of parametric Sine–Gordon equation with phase-shift and driven term","authors":"Taj Munir ,&nbsp;Muhammad Zaman ,&nbsp;Can Kang ,&nbsp;Hussan Zeb ,&nbsp;Alrazi Abdeljabbar ,&nbsp;Mohammed Daher Albalwi","doi":"10.1016/j.rinp.2025.108138","DOIUrl":"10.1016/j.rinp.2025.108138","url":null,"abstract":"<div><div>This study presents a comprehensive analytical and computational investigation of the nonlinear parametric sine-Gordon equation (sGE) with a driven term and phase shift. The sGE model captures the current and voltage dynamics across a weak connection between two superconductors, providing valuable insights into the behavior of Josephson Junction systems. To validate the results, two primary methodologies are employed for approximating solutions to the sGE. Analytically, a perturbative expansion combined with multiple-scale analysis is developed to derive system dynamics up to the fifth-order expansion. Numerically, the explicit finite difference scheme and the fourth-order Runge–Kutta finite difference method are implemented. The model equation is formulated for a <span><math><mrow><mn>0</mn><mo>−</mo><mi>π</mi><mo>−</mo><mn>0</mn></mrow></math></span> junction with appropriate initial and boundary conditions. Furthermore, the stability of the numerical scheme is rigorously analyzed, accounting for constraints imposed by the nonlinear terms. The findings reveal that the breathing modes of oscillation decay towards a constant state, with strong agreement observed between the analytical and numerical results. Additionally, one- and two-dimensional numerical computations are performed to enhance the clarity and depth of the analysis. This research significantly contributes to the fields of superconductivity and nonlinear dynamics, offering novel insights into the complex behavior of coupled systems and advancing the understanding of Josephson Junction dynamics.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108138"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143348190","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":"Optimization using RSM-CCD in the fabrication of magnesium-doped bismuth ferrite nanoparticles via sol–gel auto-combustion method for enhanced photocatalytic performance","authors":"Nur Fatin Sulaiman ,&nbsp;Mohamad Helmi Abd Mubin ,&nbsp;Saraswathy Shamini Gunasekaran ,&nbsp;A.G.N. Sofiah ,&nbsp;Kashif Tufail Chaudhary ,&nbsp;Saiful Najmee Mohamad ,&nbsp;Jalil Ali","doi":"10.1016/j.rinp.2025.108114","DOIUrl":"10.1016/j.rinp.2025.108114","url":null,"abstract":"<div><div>Magnesium-doped bismuth ferrite (BiFeO₃ or BFO) nanoparticles were fabricated through the sol–gel auto-combustion method to increase their photocatalytic performance. The synthesis parameters, specifically annealing temperature (400, 500, and 600°C) and Mg doping concentration (5, 10, 15, 20, and 25 %), were varied to investigate their effects on the photocatalytic degradation of Rhodamine B under simulated solar irradiation. The nanoparticles were then characterized using different analytical techniques to assess their structural, optical, and morphological properties. X-ray diffraction (XRD) results found that the existence of high intensity cubic sillenite phase, Bi₂₅FeO₄₀ as a secondary phase in 25 % Mg-doped bismuth ferrite nanoparticles with a crystallite size of 33.9 nm, which would enhance the photocatalytic performance. Besides, the vibrating sample magnetometer (VSM) analysis showed that the doping of Mg in the bismuth ferrite host structure significantly enhances superparamagnetic and soft ferromagnetic behavior as the dopant concentration increases from 5 to 25 % due to increase in saturation magnetization (from 2.28 emu/g to 6.19 emu/g) and reduction in coercivity (from 88.35 Oe to 49.81 Oe). Field emission scanning electron microscopy-energy dispersive X-ray spectroscopy (FESEM-EDX) micrograph shows the particles were fully crystallized with regular shapes, suggesting a uniform surface morphology. Ultraviolet–visible diffuse reflectance spectroscopy (UV–Vis DRS) found that the band gap narrows to 2.0 eV when introducing Mg doping. Based on the photocatalytic degradation activity of Rhodamine B using Mg-doped bismuth ferrite nanoparticle (annealing temperature of 600 °C, 25 % Mg concentration) successfully achieved 80 % at 60 min, which was verified using response surface methodology (RSM)-central composite design (CCD). The photodegradation reaction followed pseudo-first-order kinetics, with the rate constant for the 25 % Mg-doped bismuth ferrite nanoparticles determined to be 0.02699 min⁻¹.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108114"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149251","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":"Asymmetric acoustic field generation using asymmetrical impedance meta-surface","authors":"Jaehyeon Park,&nbsp;Jedo Kim","doi":"10.1016/j.rinp.2024.108102","DOIUrl":"10.1016/j.rinp.2024.108102","url":null,"abstract":"<div><div>In this study, we design and demonstrate an Asymmetrical Impedance Meta-surface (AIM), developed from Helmholtz resonators with variable internal coiling structures, to generate an asymmetrical acoustic field. We predict the phase delay characteristics of individual unit cells within these resonators through numerical simulations and strategically align them to ensure efficient linear variation in acoustic impedance at 5280 Hz. We validate the effectiveness of AIM by measuring the Sound Pressure Level (SPL) distribution using both numerical and experimental methods. We demonstrate that the coiled subwavelength unit cells contribute to the creation of artificial material properties, as evidenced by effective media numerical simulations. We anticipate that the use of AIM will enable the detection of lateral movements of sound sources using a single sensor, significantly reducing the need for multiple sensors and enhancing the efficiency of acoustic tracking.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108102"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150223","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":"Rectification properties of gold–alkanedithiol–graphene hybrid junctions: Enhancing performance through molecular engineering","authors":"Mohammad Norouzi,&nbsp;Ehsan Rahimi","doi":"10.1016/j.rinp.2025.108131","DOIUrl":"10.1016/j.rinp.2025.108131","url":null,"abstract":"<div><div>In this study, we investigate the rectification properties of hybrid molecular junctions featuring gold and graphene nanoribbon (GNR) electrodes, with an alkanedithiol molecular wire covalently bonded to the gold electrode and the edges of the GNR electrode, aligned coplanarly with the GNR surface. By optimizing the alkanedithiol chain length and the edge configuration of the GNR electrode, we aim to enhance the rectification ratio (RR) and current–voltage (I–V) characteristics. Utilizing density functional tight-binding (DFTB) combined with the non-equilibrium Green’s function (NEGF) method, we analyze the transmission spectra and I–V properties of these hybrid junctions. Our findings highlight the significant influence of the GNR edges at the interface with alkanedithiol on rectification and transport behavior. Notably, the 1,4-butanedithiol molecular bridge between gold and armchair GNR electrodes achieves a rectification ratio exceeding three orders of magnitude, accompanied by low leakage current. Additionally, these junctions exhibit negative differential resistance (NDR) characteristics at specific bias voltages. These exceptional findings underscore the potential of optimized hybrid molecular junctions for stable, high-efficiency rectification and NDR applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108131"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150222","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":"The properties of fluorine-doped graphene-based intermediate band solar cell materials","authors":"Lingyun Sun","doi":"10.1016/j.rinp.2025.108133","DOIUrl":"10.1016/j.rinp.2025.108133","url":null,"abstract":"<div><div>The impact of carbon atom concentration to the band structure of intermediate band material which made of one fluorine atom doped graphene are researched by first-principles calculations. After geometry optimization, the fluorine atom protruded from the graphene plane gone through a deformation of Jahn-Teller. The formation energies are small indicate that the configurations are stable. By calculating the band structures of four doping models, we found that the 4 × 4 × 1 graphene supercell doped with one fluorine atom which carbon concentration is 3.125 % has more ideal intermediate-band structure. As can be seen from the optical absorption spectrum, there are three distinct absorption peaks appear from the complex. The two sub-band gap absorption on the left are attributed to the combined effect of the electron transition from the top of the valence band to the intermediate band and from the intermediate band to the bottom of the conduction band, while the large absorption peak on the right is due to the electron transition from the bottom of the conduction band to the top of the valence band. The reason for this phenomenon should be that the polarity of C-F bonds is much larger than that between C-C bonds, and the doping of fluorine atoms causes the charge transfer between atoms, resulting in the opening of the graphene band gap and the introduction of the intermediate band.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108133"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378527","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":"Post-ball-milling-assisted solid-state synthesis of Bi4O4SeCl2: A low thermal conductivity material","authors":"Nattharika Theekhasuk ,&nbsp;Nuttakrit Somdock ,&nbsp;Athorn Voraud ,&nbsp;Iyarat Ounrit ,&nbsp;Pichet Limsuwan ,&nbsp;Komsilp Kotmool ,&nbsp;Rachsak Sakdanuphab ,&nbsp;Aparporn Sakulkalavek","doi":"10.1016/j.rinp.2025.108129","DOIUrl":"10.1016/j.rinp.2025.108129","url":null,"abstract":"<div><div>This study investigates the synthesis of Bi₄O₄SeCl₂ through a cost-effective ball-milling-assisted solid-state reaction method. The as-grown samples predominantly consisted of the Bi₁₂O₁₅Cl₆ phase, with minor contributions from BiOCl and Bi₄O₄SeCl₂. A systematic post-ball-milling process was applied to enhance the formation of the Bi₄O₄SeCl₂ phase. Prolonged milling time led to the progressive dominance of the Bi₄O₄SeCl₂ phase, resulting in significant improvements in electrical conductivity and reductions in thermal conductivity. After 30 min of milling, the carrier concentration increased notably from −2.23 × 10¹⁶ cm⁻³ (as-grown) to −1.01 × 10¹⁸ cm⁻³, while electrical conductivity rose from 0.14 S/cm (as-grown) to 2.26 S/cm. Simultaneously, thermal conductivity decreased from 0.65 W m⁻¹ K⁻¹ (as-grown) to 0.35 W m⁻¹ K⁻¹. These findings demonstrate that post-ball-milling is a scalable and economical method for synthesizing Bi₄O₄SeCl₂ with low thermal conductivity, highlighting its potential as a promising material for thermal barrier coatings and thermoelectric applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108129"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150227","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":"Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas","authors":"N. Kh. Bastykova,&nbsp;N.E. Djienbekov,&nbsp;T.S. Ramazanov,&nbsp;S.K. Kodanova","doi":"10.1016/j.rinp.2025.108136","DOIUrl":"10.1016/j.rinp.2025.108136","url":null,"abstract":"<div><div>To exclude collisions leading to the overlap of finite-sized charged particles in molecular dynamics (MD) simulations in systems like complex (dusty) plasmas, we developed a scheme to generate a pair interaction force functionally depending on the pair distribution of particles. This ensures that the pair distribution function drops to zero at distances between particles corresponding to the point where the surfaces of two particles come into contact. The presented model has a wide utility for the description of various processes in dusty plasmas. As an example, using the non-equilibrium MD method, we performed calculations of the shear viscosity and thermal conductivity of charged spherical particles interacting via screened Yukawa potential. The role of finite particle size was found to be particularly important for small values of the coupling parameter, i.e., for gas-like and weakly correlated liquid-like systems. Furthermore, we have analyzed the shear viscosity and thermal conductivity in the presence of an external uniform magnetic field.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108136"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149249","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":"Theoretical realization of intrinsic ideal Weyl semimetals in spin-gapless Weyl phase of half-Heusler KCrTe","authors":"Peng-Jen Chen","doi":"10.1016/j.rinp.2025.108110","DOIUrl":"10.1016/j.rinp.2025.108110","url":null,"abstract":"<div><div>A spin-gapless Weyl semimetal (WSM), KCrTe, is predicted by means of first-principles calculations. The novelty of spin-gapless Weyl phase is that it exhibits minimum number of Weyl points (WPs) sitting right at the Fermi level without any other trivial bands nearby. That is, KCrTe is an intrinsic ideal WSM that materials physicists have long yearned for. Regardless of the magnetization (<span><math><mover><mrow><mi>M</mi></mrow><mo>→</mo></mover></math></span>), the Weyl semimetallic phase remains and the position of the WPs aligns with <span><math><mover><mrow><mi>M</mi></mrow><mo>→</mo></mover></math></span>. This indicates the Fermi arc on surfaces can be tuned by an external magnetic field. Together with the spin-gapless feature, both Weyl electrons and holes with full spin polarization can be excited and their momenta can be manipulated. Our work demonstrates that KCrTe is not only the first realization of an intrinsic ideal WSM, but also a candidate for topological spin-gapless semiconductors that have great potential for the spintronic devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108110"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149252","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":"Hybrid structure hollow-core anti-resonant fiber with low confinement loss at 1550 nm and high birefringence in the C-band","authors":"Yuan Yang ,&nbsp;Hongxiang Xu ,&nbsp;Xuhang Li ,&nbsp;Zhiyong Ren ,&nbsp;Zhiyun Hou ,&nbsp;Jiantao Liu ,&nbsp;Changmin Xia ,&nbsp;Guiyao Zhou","doi":"10.1016/j.rinp.2025.108108","DOIUrl":"10.1016/j.rinp.2025.108108","url":null,"abstract":"<div><div>This study proposes a hollow-core anti-resonant fiber with a hybrid nested cladding structure, aimed at achieving high birefringence, broad bandwidth, and low confinement loss. The proposed fiber has a three-layer nested ring structure in the x-direction and a parallel array of four holes in the y-direction. The anti-resonance effect of multi-layer nested tubes greatly reduces the confinement loss of the fiber, while high birefringence characteristics is achieved by using different thicknesses of the cladding tubes. The coupling of the two glass modes of hybrid nested tubes and the core mode broadens the bandwidth range of low-loss and high birefringence. The theoretical results indicate that the birefringence of the fiber can reach <span><math><mrow><mn>1.06</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>4</mn></mrow></msup></mrow></math></span>, the confinement loss is as low as 1.8 dB/km at 1550 nm, and show the excellent single-mode characteristics with the higher-order mode extinction ratio 5539. Moreover, the confinement loss is as low as 2.4 dB/km at 2550 nm, and the birefringence reaches <span><math><mrow><mn>1.1</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>-</mo><mn>4</mn></mrow></msup></mrow></math></span>. The structure achieves low confinement loss, high birefringence and single mode at 1.54 ∼ 1.67 µm and 2.25 ∼ 2.85 µm dual wavelength ranges, which is the widest bandwidth range among all reported polarization maintaining fibers.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108108"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150219","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}