Indian Journal of Physics最新文献

Azimuthal magnetization in semiconductor relativistic plasma by interaction of EM waves 电磁波相互作用下半导体相对论性等离子体的方位磁化

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2026-02-20 DOI: 10.1007/s12648-025-03879-4

H. M. Ikram, Muhammad Zubair Khan, Sajid Ullah, Ikram Muhammad

{"title":"Azimuthal magnetization in semiconductor relativistic plasma by interaction of EM waves","authors":"H. M. Ikram, Muhammad Zubair Khan, Sajid Ullah, Ikram Muhammad","doi":"10.1007/s12648-025-03879-4","DOIUrl":"10.1007/s12648-025-03879-4","url":null,"abstract":"<div><p>A circularly polarized Laguerre-Gaussian (LG) laser beam interacting with a semiconductor plasma can produce a quasi-static magnetic field in the azimuthal direction. In order to achieve this, the equations for electron and hole momentum are taken into consideration includingthe relativistic ponderomotive and Lorentz forces on equal footing.However, the present model neglects quantum corrections due to low number densities of the charge carriers and omits the thermal pressure of electrons and holes in comparison with the ponderomotive force of the LG laser beam. The electron and hole velocities are aligned along the z-axis to generate the plasma current density according to Ampère’s law, which results in a quasi-static magnetic field in the azimuthal direction. This magnetic field strongly depends on the intensity of the LG laser beam and can be analyzed to confirm its behavior in ultra-relativistic and non-relativistic limits. Numerically, the study investigates how the azimuthal and radial mode numbers, pulse amplitude, and hole-to-electron effective mass ratios affect the magnetic field profiles in semiconducting plasmas. Finally, the present study shows that this magnetic field strongly depends on the intensity of the LG laser beam which may confirm its behavior in nonrelativistic limits instead of relativistic limits.\u0000</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 4","pages":"1685 - 1692"},"PeriodicalIF":1.7,"publicationDate":"2026-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863118","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

Correction to the response of many-fermion systems and its impulse approximation 多费米子系统响应的修正及其脉冲近似

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2026-02-10 DOI: 10.1007/s12648-025-03897-2

Yahya Younesizadeh, Younes Younesizadeh, Shahab Zorriasatein

引用次数: 0

Performance evaluation and optimization of PV systems on ellipsoidal rooftops using helioscope: a case study in Balikpapan 利用日光镜对椭球屋顶光伏系统进行性能评估与优化：以巴厘巴班岛为例

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2026-01-08 DOI: 10.1007/s12648-025-03891-8

Nurul Hiron, Nundang Busaeri, Nur Yanti, Mohamad Afendee Mohamed, Aceng Sambas, Volodymyr Rusyn

{"title":"Performance evaluation and optimization of PV systems on ellipsoidal rooftops using helioscope: a case study in Balikpapan","authors":"Nurul Hiron, Nundang Busaeri, Nur Yanti, Mohamad Afendee Mohamed, Aceng Sambas, Volodymyr Rusyn","doi":"10.1007/s12648-025-03891-8","DOIUrl":"10.1007/s12648-025-03891-8","url":null,"abstract":"<div><p>This study investigated the performance optimization of photovoltaic system (PV) systems installed on an ellipsoidal rooftop at the <i>Politeknik Balikpapan</i> Building, addressing the unique challenges posed by curved surfaces, such as uneven irradiance distribution and shading effects. This research aims to evaluate and compare the performance of monocrystalline and polycrystalline PV modules using Helioscope software, with a focus on two key metrics: Performance Ratio (PR) and Energy Density Ratio (EDR). Simulations were conducted by segmenting the rooftop into distinct areas based on azimuth angles, allowing a detailed analysis of the shading impact. The results showed that monocrystalline PV modules achieved a PR of 71.5%, outperforming polycrystalline modules, which recorded a PR of 61.6%. However, polycrystalline PV exhibited greater stability in terms of energy density, with an EDR reduction of only 7.8% compared with 6.9% for monocrystalline PV. The average energy production was 35,246 kWh for the monocrystalline PV and 29,922 kWh for the polycrystalline PV. These findings highlight that, while monocrystalline PV offer higher efficiency, polycrystalline PV provide better performance consistency under variable environmental conditions. This study provides valuable insights for optimizing PV system design on complex architectural surfaces, thereby contributing to the advancement of renewable energy technologies. </p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 3","pages":"1093 - 1108"},"PeriodicalIF":1.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147754411","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

Propagation properties of the spatiotemporal collinear Airy Ince-Gaussian beams in strongly nonlocal nonlinear media 时空共线Airy - Ince-Gaussian光束在强非局部非线性介质中的传播特性

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-29 DOI: 10.1007/s12648-025-03851-2

Xiaping Zhang, Ran Chen, Yinan Zhu

{"title":"Propagation properties of the spatiotemporal collinear Airy Ince-Gaussian beams in strongly nonlocal nonlinear media","authors":"Xiaping Zhang, Ran Chen, Yinan Zhu","doi":"10.1007/s12648-025-03851-2","DOIUrl":"10.1007/s12648-025-03851-2","url":null,"abstract":"<div><p>The odd controllable spatiotemporal Airy Ince-Gaussian (CAIG) beam and the even controllable spatiotemporal CAIG beam is investigated theoretically and numerically by solving the (3 + 1)D Schrödinger equation in cylindric coordinates. Typical examples of the obtained solutions are based on the ratio of the input power and the critical power, the direction factor, the ellipticity and mode number in strongly nonlocal nonlinear media (SNNM). The properties of the two spatiotemporal Airy Ince-Gaussian beams, which is combined by the odd CAIGs beam and the even CAIG beams, propagating collinearly in SNNM are studied. The controllable spatiotemporal Airy hollow Ince-Gaussian (CAhIG) wave packets are attained in SNNM. The CAhIG wave packets will keep approximately non-dispersion properties in temporal dimension. If the ratio of the input power and the critical power isn’t equal to 1, the CAhIG beams periodically oscillating during propagation. The direction of the energy flow of CAhIG wave packets in spatial domain will rotate clockwise or counterclockwise around the propagating center. The energy flow density distribution of vortices can be applied to the noninvasive capture of particles. Their Poynting vector snapshots at different propagating distances are shown.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 3","pages":"1109 - 1117"},"PeriodicalIF":1.7,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147754424","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

Quantum environment-induced dissipative and fluctuated dynamics of a charged particle in a semiclassical field 半经典场中带电粒子的量子环境诱导耗散和涨落动力学

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-24 DOI: 10.1007/s12648-025-03889-2

Adam Moradian

引用次数: 0

Systematic double folding analysis of 7Li + 138Ba near-barrier scattering with M3Y-paris interactions M3Y-paris相互作用下7Li + 138Ba近垒散射的系统双折叠分析

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-23 DOI: 10.1007/s12648-025-03894-5

Mohamed A. Dewidar, Ibrahim Bondouk, N. Amangeldi, G. Yergaliuly, A. Baratova, Sh. Hamada

{"title":"Systematic double folding analysis of 7Li + 138Ba near-barrier scattering with M3Y-paris interactions","authors":"Mohamed A. Dewidar, Ibrahim Bondouk, N. Amangeldi, G. Yergaliuly, A. Baratova, Sh. Hamada","doi":"10.1007/s12648-025-03894-5","DOIUrl":"10.1007/s12648-025-03894-5","url":null,"abstract":"<div><p>The elastic scattering angular distributions for the <sup>7</sup>Li + <sup>138</sup>Ba system at energies between 21 and 32 MeV were analyzed using the double folding model with M3Y-Paris interactions and realistic densities. Five density-dependent interaction models—DDM3Y1, CDM3Y2, CDM3Y4, CDM3Y6, and BDM3Y1—were tested. The BDM3Y1 potential, which is the shallowest, required the largest normalization factor (<i>N</i><sub><i>R</i></sub>) to fit the data, whereas the deepest potential (DDM3Y1) required the smallest <i>N</i><sub><i>R</i></sub>. These results align with the nuclear incompressibility values of each model. A systematic reduction in the real potential strength (<i>N</i><sub><i>R</i></sub> ≈ 0.43–0.46) was observed, consistent with studies of other weakly bound projectiles. The analysis confirmed the presence of the breakup threshold anomaly, as evidenced by the non-vanishing imaginary potential below the Coulomb barrier. This underscores the significant role of breakup processes in modifying elastic scattering dynamics near the barrier.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 4","pages":"1605 - 1613"},"PeriodicalIF":1.7,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863114","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

The influence of Mn doping on Raman, thermal, ac conductivity, dielectric and modulus properties of magnesium sulphate heptahydrate crystals Mn掺杂对七水硫酸镁晶体拉曼、导热、交流电导率、介电和模量性能的影响

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-20 DOI: 10.1007/s12648-025-03887-4

Radhika Rathod, V. J. Pandya, Hepi Ladani, Rupal Solanki, Maulik Zala, H. O. Jethva

{"title":"The influence of Mn doping on Raman, thermal, ac conductivity, dielectric and modulus properties of magnesium sulphate heptahydrate crystals","authors":"Radhika Rathod, V. J. Pandya, Hepi Ladani, Rupal Solanki, Maulik Zala, H. O. Jethva","doi":"10.1007/s12648-025-03887-4","DOIUrl":"10.1007/s12648-025-03887-4","url":null,"abstract":"<div><p>Pure and manganese (Mn) doped magnesium sulphate heptahydrate (MSH) crystals, by changing the mol.% of Mn, were grown by solution growth technique at normal room temperature. The grown crystals were characterized by various characterization techniques such as elemental analysis, Raman analysis, thermal analysis, dielectric spectroscopic analysis, ac conductivity analysis and modulus spectroscopic analysis. The elemental analysis confirmed the presence of Mn in the crystal lattice of pure MSH. Raman analysis showed the presence of characteristic vibrations of sulphate (SO<sub>4</sub>) group in pure and Mn doped MSH crystals. Mn doping resulted into increase in peak intensity of SO<sub>4</sub> group. The thermal study showed strong bonding of water molecules with the crystal lattice of Mn doped MSH crystals. Kinetic and thermodynamics parameters were evaluated and showed thermodynamically unstable, non-spontaneous and endergonic process of dehydration of pure and Mn doped MSH crystals. Dielectric study showed the normal dielectric behavior of pure and Mn doped MSH crystals. Mn doping resulted into increase in dielectric constant and loss values. The ac conductivity analysis showed increased conductivity of Mn doped MSH crystals following Jonscher power law. Modulus study showed grain and grain boundary relaxation mechanism in the pure MSH crystal, while dominant effect of grain relaxation mechanism in the Mn doped MSH crystals. The stretch exponent parameter showed non-Debye relaxation mechanism in the pure and Mn doped MSH crystals.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 4","pages":"1547 - 1559"},"PeriodicalIF":1.7,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863103","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

Non-geodesic motion and Raychaudhuri dynamics in f(G) gravity with imperfect fluid coupling 非测地线运动和非完全流体耦合f(G)重力中的Raychaudhuri动力学

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-19 DOI: 10.1007/s12648-025-03893-6

Y. Alipour Fakhri, Mojtaba Safdarian, S. Zamani Moghaddam

引用次数: 0

Variational optimization for constructing inverse potentials of proton-proton scattering: a phase function method study 构建质子-质子散射逆势的变分优化：一种相函数方法研究

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-17 DOI: 10.1007/s12648-025-03896-3

Lalit Kumar, Arushi Sharma, Anil Khachi, Ayushi Awasthi, O. S. K. S. Sastri

{"title":"Variational optimization for constructing inverse potentials of proton-proton scattering: a phase function method study","authors":"Lalit Kumar, Arushi Sharma, Anil Khachi, Ayushi Awasthi, O. S. K. S. Sastri","doi":"10.1007/s12648-025-03896-3","DOIUrl":"10.1007/s12648-025-03896-3","url":null,"abstract":"<div><p>The phase-shift analysis of proton-proton scattering has been studied by various research groups using realistic potentials that comprise multiple internal interactions mediated by pions and mesons, with a large number of parameters. The goal of the research is to construct inverse potentials for various <span>(ell)</span>-channels of proton-proton(pp) elastic scattering using the 3-parameter Morse function in combination with atomic Hulth<span>(grave{e})</span>n utilizing the phase function method and the variational optimization technique. The implementation of variational optimization begins by randomly assigning initial values to the parameters of the Morse model. Using the Morse + atomic Hulth<span>(grave{e})</span>n potential as input, the phase equations for various <span>(ell)</span>-channels are numerically solved using the RK-5 method to obtain the simulated Scattering Phase Shifts (SPS). We choose the mean squared error between the simulated and expected SPS as the cost function. Variational optimization iteratively adjusts potential parameters and re-evaluates the cost function until it achieves convergence. The analysis revealed that all the obtained scattering phase shifts across various <span>(ell)</span> channels converge to a mean-squared error of <span>(le)</span>0.3. The computed cross-sections matched the experimental ones to less than 1% for energies up to 25 <i>MeV</i>. The scattering parameters also closely match the experimental data. The inverse potentials constructed for various <span>(ell)</span>-channels using Morse+atomic Hulth<span>(grave{e})</span>n are on par with the currently available high-precision realistic potentials.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 4","pages":"1615 - 1625"},"PeriodicalIF":1.7,"publicationDate":"2025-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147863079","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

Studying lump waves in a (2+1)-dimensional spatially symmetric generalized Korteweg-de Vries model 研究（2+1）维空间对称广义Korteweg-de Vries模型中的块状波

IF 1.7 4区物理与天体物理

Indian Journal of Physics Pub Date : 2025-12-15 DOI: 10.1007/s12648-025-03882-9

Wen-Xiu Ma, Sumayah Batwa

引用次数: 0