Indian Journal of Physics最新文献

{"title":"Complexity-controlled modeling of charged 4U 1820–30 in the Starobinsky framework of modified gravity","authors":"Mudasar Rehman,&nbsp;S. A. Mardan,&nbsp;A. Zahra,&nbsp;Allah Ditta","doi":"10.1007/s12648-026-04104-6","DOIUrl":"10.1007/s12648-026-04104-6","url":null,"abstract":"<div><p>In this study, we investigate nonlinear, radiating, charged, and anisotropic stellar configurations in the framework of <i>f</i>(<i>R</i>) gravity, adopting the Starobinsky model as a representative curvature-corrected modification of general relativity. The stellar models are developed by employing two formulations of the generalized polytropic equation of state: one expressed in terms of mass density and the other in terms of energy density. This dual formulation provides a broader phenomenological description of dense-matter behavior in compact stellar interiors. The gravitational complexity factor is incorporated as an additional constraint to regulate the effects of density inhomogeneity, pressure anisotropy, charge, and radiation density, thereby supporting the construction of mathematically consistent and physically acceptable configurations. To examine the viability of the resulting models, we perform a detailed graphical analysis of the relevant physical variables for the compact object <span>(4U~1820-30)</span>. The obtained profiles satisfy the imposed regularity, stability, causality, and energy-condition requirements for the selected parameter ranges. These results indicate that complexity-controlled polytropic models in modified gravity may provide a useful framework for describing dense, charged, anisotropic compact objects.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 10","pages":"4003 - 4019"},"PeriodicalIF":1.7,"publicationDate":"2026-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909699","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}

{"title":"Engineering the electronic and optical properties of graphene quantum dot via oxygen doping and structural defects: a DFT-based approach","authors":"Noora B. Shwayyea,&nbsp;Fouad N. Ajeel,&nbsp;Mustafa K. Salman,&nbsp;Alaa M. Khudhair,&nbsp;Ali Ben Ahmed","doi":"10.1007/s12648-026-04106-4","DOIUrl":"10.1007/s12648-026-04106-4","url":null,"abstract":"<div><p>Graphene quantum dots (GQDs) have emerged as promising nanomaterials for next-generation optoelectronic, sensing, and energy applications owing to their size-dependent electronic and optical properties. However, precise control over their band structures and chemical reactivities remains a significant challenge. In this study, we employed density functional theory to systematically investigate the impact of oxygen doping and structural vacancy defects on the electronic, optical, and chemical properties of GQDs. Our results reveal that introducing vacancy defects significantly reduces the band gap from 2.717 eV in pristine GQDs to as low as 0.479 eV enhancing electrical conductivity by several orders of magnitude. Furthermore, site- and concentration-specific oxygen doping modulates key descriptors such as formation energy, chemical potential, global hardness, and electrophilicity. The lowest formation energy (− 82.383 eV) and highest conductivity (95 S/m) were achieved in GQDs with three oxygen atoms, confirming their thermodynamic and electronic favorability. Analysis of the optical absorption spectra revealed a tunable threshold extending from the visible to mid-wave infrared (MWIR) regions, emphasizing the material’s adaptability for light-harvesting technologies. This study demonstrates the potential of defect and dopant engineering to effectively modulate the properties of GQDs, paving the way for their optimized design in advanced nanoelectronics and optoelectronic systems.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 9","pages":"3655 - 3665"},"PeriodicalIF":1.7,"publicationDate":"2026-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752260","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}

{"title":"Impacts of substitutional Mn-doping on the structural, morphological, optical, and photocatalytic properties of MoS2 nanoparticles synthesized by hydrothermal method","authors":"Mahmoud A. M. Hussien,&nbsp;Abdulaziz Abu El-Fadl","doi":"10.1007/s12648-026-04093-6","DOIUrl":"10.1007/s12648-026-04093-6","url":null,"abstract":"<div><p>In this article, pure and manganese (Mn)-substituted molybdenum disulfide (Mo_1-xMn_xS₂) nanostructures were synthesized using the hydrothermal method for photocatalytic activity. A number of characterization techniques were employed to examine the impact of Mn incorporation on the morphological, structural, optical, and photocatalytic characteristics of MoS₂. The samples were analyzed using field emission scanning electron microscopy, which revealed an aggregated nanoflower-like structure in the recorded images. X-ray diffraction technique was performed to examine the crystal structure of pure and Mn-doped MoS₂ samples, and the results confirmed the formation of the 2H-MoS₂ polytype in all the as-prepared nanostructures, with a reduction in the average crystallite size by increasing the dopant concentration. Edge-terminated active sites in the Mn-doped samples were indicated by Raman analysis. Also, further investigation of the structure was carried out using Fourier transform infrared spectroscopy, confirming the presence of the characteristic Mo-S band. The elemental composition of pure and Mn-doped MoS₂ nanoflowers (NFs) was verified by energy-dispersive X-ray spectroscopy. Brunaure-Emmett-Teller surface analysis was performed to find out the impact of Mn doping on the surface area. The optical properties were observed through ultraviolet–visible spectroscopy, demonstrating allowed direct transitions with an optical energy bandgap that gradually decreased with increasing Mn concentration. The photocatalytic performance of undoped and Mn-doped MoS₂ NFs was evaluated through the degradation of methylene blue (MB) dye under visible-light irradiation. This study demonstrates that high photocatalytic efficiency (96% MB degradation in 60 min under visible light) is achieved at a low Mn concentration (1.5%), highlighting that controlled Mn incorporation enhances charge separation without excessive doping.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 10","pages":"4253 - 4270"},"PeriodicalIF":1.7,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909753","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}

{"title":"Pressure-induced modification of the electronic, elastic and optical properties of HfNiSn Half Heusler alloys","authors":"Pawan Kumar Singh,&nbsp;Komal Verma,&nbsp;Brijmohan Prajapati,&nbsp;Rahul Kumar Gangwar,&nbsp;Vikrant Chaudhary,&nbsp;Mudasir Younis Sofi,&nbsp;Rishi Pal Singh,&nbsp;Pushpendra Kumar,&nbsp;Arvind Kumar","doi":"10.1007/s12648-026-04103-7","DOIUrl":"10.1007/s12648-026-04103-7","url":null,"abstract":"<div><p>The pressure-dependent physical properties of the half-Heusler alloy HfNiSn were investigated via first-principles calculations within the PBE-GGA framework. Structural optimization revealed that HfNiSn is most stable in a nonmagnetic γ-phase cubic structure (space group <i>F</i><span>(overline{4}3m)</span>). Electronic structure analysis revealed semiconducting behavior with an indirect band gap of 0.36 eV, whereas the formation and cohesive energy values confirmed its thermodynamic stability. The calculated elastic constants, Young’s moduli, shear moduli, and Poisson’s ratios demonstrate the mechanical stability and ductility characteristics for the studied pressure range. The optical spectra indicate strong absorption in the visible and ultraviolet regions, with the optical conductivity being maximized in the visible range and enhanced under pressure. These findings highlight the favourable electronic, mechanical, and optical properties of HfNiSn, supporting its potential in future optoelectronic applications.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 11","pages":"4643 - 4655"},"PeriodicalIF":1.7,"publicationDate":"2026-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149162898","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}

{"title":"Effect of severe geomagnetic storm on ionospheric TEC at two longitude regions","authors":"Anurag Chaudhari,&nbsp;Abha Singh,&nbsp;Gyaneshwar Sharma,&nbsp;A. K. Singh","doi":"10.1007/s12648-026-04099-0","DOIUrl":"10.1007/s12648-026-04099-0","url":null,"abstract":"<div><p>In this study, we investigated the responses of the ionosphere during a severe geomagnetic storm at six stations at two distinct latitudes around approximately (75 ± 5) ° E (IISC, POL2, and DGAR) and (145 ± 5) ° E (GUUG, MTKA, and LAE1). In order to investigate the impact of severe geomagnetic storms with Dst indices of− 404.14 nT and− 437.28 nT, respectively, that occurred on May 10 and 11, 2024, we used Global Positioning System (GPS) based total electron density (TEC) data and O/N₂ ratio plot downloaded from the TIMED/GUVI website. The TEC value was impacted by this geomagnetic storm, positively and negatively at both latitudes. The effect is mainly due to the combined action of prompt penetration electric field (PPEF), disturbance dynamo electric field (DDEF) and traveling ionospheric disturbances (TIDs). The O/N₂ ratio played a crucial role in deciding positive and negative effect on TEC during geomagnetic storm which is evident by the results obtained from two latitudes on same longitude. On May 11, 2024, the combined impact of DDEF and storm-induced traveling ionospheric disturbances (TIDs) may have caused an increase in TEC. By longitudinal comparison of geomagnetic storm effect, we found that the two stations on the nearly same latitude (~ 6.5 ° S) show different type of variation in TEC and O/N₂ ratio. On commencement of storm (May 10 and 11) the effect was different at different stations. We observed longitudinal and latitudinal variations both. The increment in TEC at LAE1 is a greater amount compared to that at DGAR. At IISC and GUUG, we observe that during the main phase of the storm on 11th May, the effect was positive, but during the recovery phase, it became negative on the same day at both stations. There was a negative effect at both stations, MTKA and POL2, in different amounts. On 11 May, this effect at MTKA was less in comparison to POL2, and on 12th May the effect at MTKA was very large in comparison to that at POL2.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 10","pages":"3987 - 4001"},"PeriodicalIF":1.7,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909595","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}

{"title":"Characterization of 2G HTS superconducting tapes: a study on properties and morphological changes","authors":"H. P. Gonçalves,&nbsp;L. S. Coelho,&nbsp;E. M. Bittar,&nbsp;D. M. do Carmo,&nbsp;A. Middea,&nbsp;R. N. Oliveira,&nbsp;A. R. Bigansolli","doi":"10.1007/s12648-026-04067-8","DOIUrl":"10.1007/s12648-026-04067-8","url":null,"abstract":"<div><p>Second-generation high-temperature superconducting (2G HTS) tapes are of paramount importance for various industrial applications, particularly in the development of advanced electronic devices, due to their exceptional ability to support high electrical currents and strong magnetic fields. However, a significant challenge arises from the degradation of critical current (Ic) when these materials are subjected to torsional stresses during production, which can compromise their performance. This study investigates the impact of cryogenic temperatures and torsional stress on the electrical, magnetic, and morphological properties of superconducting tapes designated as Tape A and Tape B. Our results show that both tapes exhibit characteristic superconducting behavior, with critical temperatures of 92 K and 93 K, respectively. Notably, despite significant morphological changes, including embrittlement and compaction of the superconducting layer, as revealed by Scanning Electron Microscopy (SEM) analysis, the superconducting properties of the tapes remained intact. These findings suggest that Tape A and Tape B are suitable for applications requiring exposure to cryogenic temperatures and mechanical stress, and provide valuable insights for the research and development of 2G HTS tapes.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 10","pages":"4431 - 4438"},"PeriodicalIF":1.7,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909613","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}

{"title":"Noether symmetry and conserved quantities of electromechanical systems on time scales","authors":"Kemu Chen,&nbsp;Yu Xie,&nbsp;Xiangwei Chen","doi":"10.1007/s12648-026-04088-3","DOIUrl":"10.1007/s12648-026-04088-3","url":null,"abstract":"<div><p>This paper investigates Noether symmetry and its associated conserved quantities in electromechanical systems formulated on time scales. First, based on the Lagrange–Maxwell equations for electromechanical systems, a general description of holonomic systems is established in terms of generalized coordinates. Subsequently, by applying the Hamilton principle on time scales, the Lagrange–Maxwell equations for electromechanical systems are derived within the time-scale framework. On this basis, a theorem concerning the Noether conserved quantities for such systems is proposed and rigorously proved. Furthermore, the corresponding Noether conservation corollaries are obtained for both continuous-time and discrete-time cases. These results provide a unified theoretical framework that encompasses the conservation laws for the two classes of systems. Finally, the effectiveness and applicability of the proposed theory are validated through a practical case study involving an electromagnetic piston.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 10","pages":"4345 - 4352"},"PeriodicalIF":1.7,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909641","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}

{"title":"A DFT study of physical properties of double perovskites Cs2XSnCl6 (X = Ca or Mg)","authors":"S. El Kamli,&nbsp;Y. Selmani,&nbsp;A. Jabar,&nbsp;L. Bahmad,&nbsp;A. Kassou-Ou-Ali","doi":"10.1007/s12648-026-04101-9","DOIUrl":"10.1007/s12648-026-04101-9","url":null,"abstract":"<div><p>This work investigates the physical properties of double perovskite systems <i>Cs</i>_<i>2</i><i>XSnCl</i>_<i>6</i><i> (X</i> = <i>Ca or Mg)</i> using density functional theory (DFT), focusing on their structural, mechanical, optoelectronic, and thermoelectric characteristics. These materials crystallize in cubic structures, with lattice constants of 10.71 Å and 10.42 Å for <i>Cs</i>_<i>2</i><i>CaSnCl</i>_<i>6</i> and <i>Cs</i>_<i>2</i><i>MgSnCl</i>_<i>6</i>, respectively. Mechanical stability assessments confirm that both materials are stable in the cubic phase. Furthermore, mechanical stress analysis clearly demonstrates that both compounds are mechanically stable and exhibit anisotropy. However, <i>Cs</i>_<i>2</i><i>CaSnCl</i>_<i>6</i> exhibits ductile behavior, whereas <i>Cs</i>_<i>2</i><i>MgSnCl</i>_<i>6</i> is brittle. The computed band gaps are 4.23 eV for <i>Cs</i>_<i>2</i><i>CaSnCl</i>_<i>6</i> and 3.40 eV for <i>Cs</i>_<i>2</i><i>MgSnCl</i>_<i>6</i>, indicating their potential as wide-bandgap materials. Optical analysis reveals strong ultraviolet absorption, positioning these materials as promising candidates for UV-sensitive optoelectronic applications. Additionally, thermoelectric evaluations at room temperature show high Seebeck coefficients, enhanced electrical conductivity, and reduced electronic thermal conductivity. The dimensionless figures of merit (ZT) are 0.77 and 0.72 for <i>Cs</i>_<i>2</i><i>CaSnCl</i>_<i>6</i> and <i>Cs</i>_<i>2</i><i>MgSnCl</i>_<i>6</i>, respectively, highlighting their suitability for thermoelectric device applications.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 11","pages":"4627 - 4642"},"PeriodicalIF":1.7,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163097","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}

{"title":"Analysis of particle flux variations in the radiation belts during the intense geomagnetic storms of October–November 2003 and 10–11 May 2024","authors":"Younoussa Diakite,&nbsp;Christian Zoundi,&nbsp;Yacouba Sawadogo,&nbsp;Jean Louis Zerbo","doi":"10.1007/s12648-026-04082-9","DOIUrl":"10.1007/s12648-026-04082-9","url":null,"abstract":"<div><p>This study compares electron dynamics in the Van Allen belts and the slot region during two major geomagnetic storms: the Halloween storm (October–November 2003, disturbance storm time index Dst = -383 nT), driven by successive interplanetary coronal mass ejections (ICMEs), and the 10–11 May 2024 storm (Dst = -412 nT), caused by a composite ICME formed by interacting coronal mass ejections. I n the slot region (L = 2–3), the flux enhancement during the main phase of the 2024 storm was very limited (median During/Before ratios: 3.0 at 0.55 MeV, 1.9 at 0.65 MeV, 2.4 at 1.70 MeV), in clear contrast to the Halloween storm’s large immediate increases (136.7 at 3.75 MeV, 31.3 at 8.25 MeV). However, the 2024 event exhibited a remarkable delayed amplification, with median After/Before ratios of 1681, 693, and 317, and After/During ratios exceeding 500, compared to ~ 10–12 in 2003. This result demonstrates that the final slot state depends more on post-storm acceleration efficiency, via very low frequency (VLF) chorus waves, ultra-low frequency (ULF)-driven radial diffusion, and substorm injections, than on storm intensity alone. Post-peak exponential decay fits yield systematically shorter lifetimes that are energy-dependent. In 2024, τ = 3.83 ± 0.26 d at 0.55 MeV, 3.82 ± 0.23 d at 0.65 MeV, and 11.77 ± 0.98 d at 1.70 MeV. For the November 2003 recovery, τ = 8.34 ± 0.78 d (3.75 MeV) and 8.20 ± 1.26 d (8.25 MeV); during the later December phase, the timescales diverge sharply, with τ = 3.13 ± 0.10 d at 3.75 MeV versus 18.77 ± 1.90 d at 8.25 MeV. All fits show good to excellent correlations (R ≥ 0.882), confirming that pure exponential loss dominates once the acceleration ceases. The loss timescales increase with energy, consistent with pitch-angle scattering by plasmaspheric hiss, and the strong divergence in the December 2003 period reveals a pronounced energy filtering effect. Overall, extreme storms can produce significant delayed enhancements when the interplanetary driver sustains wave activity and injections, even with a weak prompt injection. These findings provide valuable new insights for radiation risk forecasting for satellites in medium-Earth orbit (MEO), geostationary Earth orbit (GEO), and low-Earth orbit (LEO). </p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 9","pages":"3531 - 3550"},"PeriodicalIF":1.7,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752303","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}

{"title":"Comparative insights into photo-degradation of methylene blue and methyl orange dyes utilizing Sulfur/ MWCNT nanocomposites","authors":"Karishma Jain,&nbsp;Deepika Maan,&nbsp;Ashish Kumar,&nbsp;Banwari Lal Choudhary,&nbsp;Pradeep Reddy Vanga,&nbsp;Sushil Kumar Jain,&nbsp;Balram Tripathi","doi":"10.1007/s12648-026-04105-5","DOIUrl":"10.1007/s12648-026-04105-5","url":null,"abstract":"<div><p>Sulfur/MWCNT composites were synthesized using the solution casting method and characterized by using various techniques such as Raman spectroscopy, UV–Visible spectroscopy, Photoluminescence spectroscopy (PL) and Energy dispersive X-ray (EDX) analysis. The Rietveld refinement of composites has confirmed the phase of sulfur. Characteristic Raman spectral features validate the incorporation of MWCNT. The increased concentration of MWCNT in sulfur slightly narrowed the optical band gap. EDX spectra confirmed the elemental composition of synthesized composites. The composites S95% MWCNT5% and S99% MWCNT1% have been implemented into the sunlight–assisted photodegradation process in the presence of methylene blue (MB) and methyl orange (MO) dyes. The pseudo-first reaction kinetic model was applied to the observed absorbance responses. Using sulfur-based MWCNT composites, degradation efficiencies of (33–37)% for methylene blue and (14–19)% for methyl orange were obtained.</p></div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"100 9","pages":"3893 - 3904"},"PeriodicalIF":1.7,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752304","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}