Results in Physics最新文献_第6页

MoXSiN2(X=S, Se, Te)/Metal heterojunction with tunable Schottky barrier height and Fermi level pinning effect by switching electric dipole MoXSiN2(X=S, Se, Te)/金属异质结具有可调肖特基势垒高度和费米能级钉钉效应

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-09-01 DOI: 10.1016/j.rinp.2025.108402

Lianmeng Yu , Jianan Lin , Xiaobo Feng , Xin He

引用次数: 0

Tunable electromagnetically induced transparency and polarization frequency switches in photosensitive silicon-VO2-graphene metamaterial 光敏硅- vo2 -石墨烯超材料中可调谐电磁感应透明和极化频率开关

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-09-01 DOI: 10.1016/j.rinp.2025.108418

Junjiao Lu, Xuejun Qiu, Yi Wang, Zhenzhou Cao, Jin Hou, Chengzhi Jin

{"title":"Tunable electromagnetically induced transparency and polarization frequency switches in photosensitive silicon-VO2-graphene metamaterial","authors":"Junjiao Lu, Xuejun Qiu, Yi Wang, Zhenzhou Cao, Jin Hou, Chengzhi Jin","doi":"10.1016/j.rinp.2025.108418","DOIUrl":"10.1016/j.rinp.2025.108418","url":null,"abstract":"<div><div>This work presents a hybrid metamaterial platform integrating graphene, photosensitive silicon, and vanadium dioxide (VO<sub>2</sub>) to achieve dynamically tunable electromagnetically induced transparency (EIT) and polarization-selective frequency switching in the terahertz (THz) regime. The unit cell comprises a graphene cruciform (GC) resonator and four quarter graphene rings resonator (QGRs), enabling precise control of the EIT window’s amplitude and frequency through Fermi level modulation. The EIT effect exhibits robust angular insensitivity (<70°), with a frequency modulation depth of 0.176 and amplitude modulation depth of 0.907. Leveraging the light-driven conductivity of photosensitive silicon and the insulator-to-metal phase transition of VO<sub>2</sub>, the structure dynamically switches between slow-light states and enables single-/dual-frequency polarization-selective transmission at 1.26 THz, 1.85 THz, and 1.14/1.79 THz, achieving a modulation depth up to 92 %. This tri-material synergy overcomes the rigidity of conventional single-component systems, offering a reconfigurable framework for THz communication and sensing devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108418"},"PeriodicalIF":4.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988485","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}

引用次数: 0

Analysis and simulation of magnetocrystalline anisotropy of misch metal magnets 杂化金属磁体磁晶各向异性的分析与仿真

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-09-01 DOI: 10.1016/j.rinp.2025.108416

Jiefu Xiong , Dan Liu , Ruoshui Liu , Xin Ming , Lichen Wang , Xinqi Zheng , He Bai , Yinong Yin , Jianfeng Xi , Tongyun Zhao , Fengxia Hu , Baogen Shen

{"title":"Analysis and simulation of magnetocrystalline anisotropy of misch metal magnets","authors":"Jiefu Xiong , Dan Liu , Ruoshui Liu , Xin Ming , Lichen Wang , Xinqi Zheng , He Bai , Yinong Yin , Jianfeng Xi , Tongyun Zhao , Fengxia Hu , Baogen Shen","doi":"10.1016/j.rinp.2025.108416","DOIUrl":"10.1016/j.rinp.2025.108416","url":null,"abstract":"<div><div>2:14:1-type rare earth magnets play an indispensable role in many fields such as industry, military and electrical appliances because of their excellent hard magnetic performance. The magnetocrystalline anisotropy of magnetic materials is a crucial intrinsic parameter to ensure the high coercivity of materials. However, since MM<sub>2</sub>Fe<sub>14</sub>B prepared by misch metal (MM) is difficult to form single crystals, the accurate determination of the magnetocrystalline anisotropy has become the focus of research. In this work, the anisotropy of MM<sub>13</sub>Fe<sub>81</sub>B<sub>6</sub> compound is analyzed by means of singular point detection, extrapolation line and refracted line method. The contribution of rare earth ions to the anisotropy energy and its relationship with the anisotropy coefficient were described by single-ion anisotropy fitting. When the anisotropy constant, saturation magnetic polarization intensity and temperature are in the regions of 0.06–1.22 MJ/m<sup>3</sup>, 1.651–1.658 T and 80–130 K, MM<sub>2</sub>Fe<sub>14</sub>B can maintain a relatively high anisotropy field (>7 × 10<sup>3</sup> kA/m). The micromagnetic simulation further confirmed the roles of these parameters in the coercivity and the process of magnetic reversal. A full understanding of the anisotropy field, anisotropy constant, anisotropy coefficient and its change with temperature is conducive to the improvement of coercivity and magnetic properties of high abundance rare earth magnet materials.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108416"},"PeriodicalIF":4.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921890","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}

引用次数: 0

A bifluidic model formalism analyzing sheath plasma resonance in inverted fireballs 分析倒火球鞘层等离子体共振的双流模型形式

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-09-01 DOI: 10.1016/j.rinp.2025.108413

Subham Dutta , Johannes Gruenwald , Pralay Kumar Karmakar

{"title":"A bifluidic model formalism analyzing sheath plasma resonance in inverted fireballs","authors":"Subham Dutta , Johannes Gruenwald , Pralay Kumar Karmakar","doi":"10.1016/j.rinp.2025.108413","DOIUrl":"10.1016/j.rinp.2025.108413","url":null,"abstract":"<div><div>The sheath plasma resonance (SPR) in an inverted fireball (IFB) system is semi-analytically investigated in the framework of a generalized hydrodynamic isothermal model formalism comprising of electron–ion fluids. It incorporates the constitutive ionic fluid viscosity, inter-species collisions, and geometric curvature effects. The SPR stability is investigated for an anodic (hollow, meshed) IFB for the first time against the traditional cathode-plasma arrangements of regular electrode (solid, smooth) fireballs. The SPR develops in the vicinity of a spherical electrode enclosed by a plasma sheath amid a given electric potential. A generalized linear quartic dispersion relation (DR) with diverse plasma multi-parametric dispersion coefficients is methodically derived using a standard spherical linear normal mode analysis. The mathematical construct of the DR roots confirms that there exists only one feasible nonzero frequency mode (emerging in the IFB). This DR root is studied both analytically and numerically. This consequent SPR creates trapped acoustic fluctuations in the IFB plasmas because of the internal reflections at the sheath plasma boundary. Also, sensible parametric changes in the SPR characteristics, with both plasma density and viscosity, are seen. A local condition for the SPR excitation and its subsequent transition to collective standing wave-like patterns in the IFBs is illustratively analyzed. A fair corroboration of our investigated results with the previously reported SPR experimental observations of standing wave-like eigenmode patterns (evanescent) validates the practical reliability of our proposed study.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108413"},"PeriodicalIF":4.6,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145003667","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}

引用次数: 0

International Advisory Board 国际咨询委员会

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-09-01 DOI: 10.1016/S2211-3797(25)00330-4

引用次数: 0

Localization and dynamics in one-dimensional and two-dimensional Gaussian disordered quantum spin systems 一维和二维高斯无序量子自旋系统的局域化和动力学

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-08-27 DOI: 10.1016/j.rinp.2025.108407

Dongyan Guo, Taotao Hu, Jiameng Hong

{"title":"Localization and dynamics in one-dimensional and two-dimensional Gaussian disordered quantum spin systems","authors":"Dongyan Guo, Taotao Hu, Jiameng Hong","doi":"10.1016/j.rinp.2025.108407","DOIUrl":"10.1016/j.rinp.2025.108407","url":null,"abstract":"<div><div>We propose a Gaussian disorder to study many-body localization (MBL) in one-dimensional quantum system and coupled system-environment models. Unlike uniform disorder, Gaussian disorder is controlled by the standard deviation <span><math><mi>σ</mi></math></span> (driving MBL transitions) and the mean <span><math><mi>μ</mi></math></span> (causing global energy shifts). By calculating the von Neumann entropy, mean gap ratio, and dynamical indicators, we elucidate the ergodic-to-MBL transition as <span><math><mi>σ</mi></math></span>, with Gaussian disorder exhibiting more pronounced finite-size critical point drift effects compared to conventional random disorder. Through finite-size scaling analysis, it shows that there are no significant differences between the two disorder types at our assumed system sizes. We construct two system-environment coupling configurations (ladder and staggered), showing that under weak coupling, the system and environment evolve independently, whereas strong coupling induces cooperative localization. The ladder configuration shows a strong dependence on the initial state, which may lead to either the loss or retention of information, while no such dependence is observed in the staggered configuration. This can be explained by the changes in energy density of the initial state caused by variations in different model structures. When treating the system-environment as a unified two-dimensional ladder, asymmetric disorder on the two chains can drive a global MBL phase transition, with slightly different behaviors compared to symmetric disorder. Additionally, we emphasize the necessity of correctly selecting the initial state when characterizing the phase transition through dynamic indicators.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108407"},"PeriodicalIF":4.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907157","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}

引用次数: 0

Comparative study of ablation processes using femtosecond and nanosecond lasers 飞秒和纳秒激光烧蚀过程的比较研究

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-08-27 DOI: 10.1016/j.rinp.2025.108415

J.Z. Wang , Y. Kanematsu , A. Muratsugu , F. Matsuda , W. Matsuda , Y. Kawai , M. Toyoda

{"title":"Comparative study of ablation processes using femtosecond and nanosecond lasers","authors":"J.Z. Wang , Y. Kanematsu , A. Muratsugu , F. Matsuda , W. Matsuda , Y. Kawai , M. Toyoda","doi":"10.1016/j.rinp.2025.108415","DOIUrl":"10.1016/j.rinp.2025.108415","url":null,"abstract":"<div><div>This study investigated the dynamic characteristics of ions emitted from materials subjected to short-pulsed laser interactions. To investigate the difference in ablation dynamics due to laser pulse irradiation with the same energy but different time scales, we developed a time-of-flight (TOF) mass spectrometer and analyzed the TOF ion profiles obtained by irradiating 180 fs 800 nm Ti:sapphire femtosecond laser and 1 ns 355 nm Nd:YAG nanosecond laser. The effects of incident laser interaction with CsI deposits were examined for laser pulse energies ranging from 400 to 1000nJ, corresponding to laser intensities of 7.1 × 10<sup>11</sup>–1.8 × 10<sup>12</sup> W/cm<sup>2</sup> for femtosecond lasers and 1.3–3.2 × 10<sup>8</sup> <!-->W/cm<sup>2</sup> for nanosecond lasers. With an ion trajectory simulation incorporating a shifted Maxwell–Boltzmann initial velocity distribution and continuous ion emission, we analyzed the ion emission dynamics from the TOF profiles. Compared with nanosecond lasers, femtosecond lasers generated ions with higher initial velocities but lower temperatures. Under nanosecond laser irradiation, ion emission continued for tens of nanoseconds after the end of the laser pulse, and its duration increased with increasing laser pulse energy. However, no continuous emission occurred under femtosecond laser irradiation.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108415"},"PeriodicalIF":4.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916433","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}

引用次数: 0

Comprehensive study of absorption coefficient and charge carrier generation in methylammonium lead iodide perovskite solar cells 碘化铅甲基铵钙钛矿太阳能电池吸收系数及载流子产生的综合研究

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-08-27 DOI: 10.1016/j.rinp.2025.108411

Hamid Shahivandi

{"title":"Comprehensive study of absorption coefficient and charge carrier generation in methylammonium lead iodide perovskite solar cells","authors":"Hamid Shahivandi","doi":"10.1016/j.rinp.2025.108411","DOIUrl":"10.1016/j.rinp.2025.108411","url":null,"abstract":"<div><div>This study investigates the mechanisms of photon absorption and the rate of charge carrier generation in methylammonium lead iodide (MAPbI<sub>3</sub>) perovskite solar cells. Charge carrier generation rates are influenced by incident light intensity, the material’s absorption coefficient, and its surface reflectivity. By reviewing experimental results from various researchers, we propose a theory for the absorption coefficient in these perovskite structures. This theory, based on band structure calculations and density of states (DOS) diagrams derived via DFT, explains the behavior of the absorption coefficient as a function of the incident photon’s energy and provides an accurate, practical, and relatively simple model. In this model, the dependence of the absorption coefficient on the incident photon energy is linked to three distinct energy gaps identified in the MAPbI<sub>3</sub> perovskite band structure, leading to a three-range representation for this dependency. Additionally,the relationship between the extinction coefficient and photon energy is derived from the absorption coefficient. Finally, this new model is applied to calculate the charge carrier generation as a function of photon energy. The insights provided by this study enhance our understanding of absorption mechanisms and offer pathways for optimizing perovskite solar cells by targeting specific energy ranges in the photon spectrum.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108411"},"PeriodicalIF":4.6,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916432","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}

引用次数: 0

Examination of the structural, morphological, and self-cleaning characteristics of graphene oxide-based nanocomposite thin films 氧化石墨烯基纳米复合薄膜的结构、形态和自清洁特性的研究

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-08-23 DOI: 10.1016/j.rinp.2025.108410

Rasha S. Yousif

{"title":"Examination of the structural, morphological, and self-cleaning characteristics of graphene oxide-based nanocomposite thin films","authors":"Rasha S. Yousif","doi":"10.1016/j.rinp.2025.108410","DOIUrl":"10.1016/j.rinp.2025.108410","url":null,"abstract":"<div><div>In this study, graphene oxide (GO)-based nanocomposites containing zinc oxide (ZnO) and tin oxide (SnO<sub>2</sub>) nanoparticles were fabricated and their structure, morphology, and self-cleaning properties were thoroughly examined. To the best of our knowledge, no effort has been made to prepare GO-ZnO and GO-SnO<sub>2</sub> nanocomposites and investigate their self-cleaning properties. In this regard, nanocomposites were initially synthesized by means of modified Hummer’s method, followed by combining GO with ZnO and SnO<sub>2</sub> nanoparticles. In order to anchor prepared thin films onto glass substrates, spray pyrolysis technique was employed.</div><div>As evidenced by X-ray diffraction (XRD) spectroscopy, SnO<sub>2</sub> and ZnO nanostructures respectively have tetragonal rutile and wurtzite phases. Morphological investigations conducted by means of field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM) respectively revealed uniform distribution of nanoparticles and considerable variations in surface roughness, which corroborate the comprehensiveness of our study. The hydrophobicity and self-cleaning properties of our fabricated nanocomposites were scrutinized using contact angle test.</div><div>The findings obtained from contact angle measurements demonstrated that the GO-SnO<sub>2</sub> nanocomposites outperform other composites in terms of hydrophobicity. The great characteristics of our GO-based nanocomposites showed their potential for sophisticated coating applications, mainly for cleaning the surfaces.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108410"},"PeriodicalIF":4.6,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902282","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}

引用次数: 0

Optimizing plasmonic nanostructures array for high-performance sensing applications 优化等离子体纳米结构阵列的高性能传感应用

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-08-21 DOI: 10.1016/j.rinp.2025.108386

Sajid Farooq , Rashid Hussain Dahar , Muhammd Waqas Yasin , May Hu , Diego Rativa , Dexing Kong , Renato E. de Araujo

{"title":"Optimizing plasmonic nanostructures array for high-performance sensing applications","authors":"Sajid Farooq , Rashid Hussain Dahar , Muhammd Waqas Yasin , May Hu , Diego Rativa , Dexing Kong , Renato E. de Araujo","doi":"10.1016/j.rinp.2025.108386","DOIUrl":"10.1016/j.rinp.2025.108386","url":null,"abstract":"<div><div>The localized surface plasmon resonance (LSPR) phenomenon, influenced by the surrounding medium, has been widely employed in optical sensors. Traditional sensors focus on refractive index sensitivity (<span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>R</mi><mi>I</mi><mi>S</mi></mrow></msub></math></span>) but neglect the broad spectral linewidth, thus limiting the detection thresholds of optical sensor. In this study, we present a novel semi-capped gold and silver nanoshells array design to improve sensing performance by optimizing both <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>R</mi><mi>I</mi><mi>S</mi></mrow></msub></math></span> and spectral linewidth. Applying computational modeling framework based on full-wave field analysis, we systematically evaluate electromagnetic field enhancement and LSPR spectral shifts. Furthermore, key metrics, including the figure of merit (FoM) and <span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>R</mi><mi>I</mi><mi>S</mi></mrow></msub></math></span>, are evaluated to determine the sensing efficacy. Our findings show that semi-capped Au nanoshells array achieve RI-based sensitivity of 536 nm RIU<sup>−1</sup> and FoM of 9.2 RIU<sup>−1</sup>, while Ag-based array demonstrate 559 nm RIU<sup>−1</sup> and FoM of 8.1 RIU<sup>−1</sup>. Moreover, our in-silico study confirms the effectiveness of platform for sensing of streptavidin and offers a detection range beyond 100 nm, surpassing conventional optical sensors. These results offer a novel technique to LSPR-based optical sensors, providing improved sensor efficacy and detection limits.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108386"},"PeriodicalIF":4.6,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912621","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}

引用次数: 0