Journal of Superconductivity and Novel Magnetism最新文献

{"title":"Chaotic Dynamics in Spin Torque Nano-oscillator Driven by Voltage Feedback","authors":"Meenakshi Sravani,&nbsp;Swapnil Bhuktare","doi":"10.1007/s10948-025-06980-1","DOIUrl":"10.1007/s10948-025-06980-1","url":null,"abstract":"<div><p>Non-linear dynamics, including auto-oscillations, chaotic dynamics, and synchronization, are integral to physical and biological applications and can be excited in spintronic devices. In this study, we are interested in exploring the excitation of chaos using voltage feedback in a spin torque nano-oscillator using a Magnetic Tunnel Junction (MTJ). According to the Poincaré-Bendixson theorem, chaos cannot arise in a two-dimensional system of MTJ featuring two dynamic variables describing the zenith and azimuth angles of magnetization. Hence, we prefer the feedback system as it creates a multi-dimensional system, making it interesting to explore the emergence of chaos in such systems. Such feedback is achieved by utilizing a 3-terminal device consisting of an MTJ with an in-plane pinned layer (PL) and an out-of-plane free layer (FL) geometry. When a DC current above the critical threshold is applied, the FL’s oscillating magnetization generates an AC output voltage through the Tunnel Magneto Resistance (TMR) effect. A fraction of this voltage, fed back after a delay, modulates the FL’s anisotropy via voltage controlled magnetic anisotropy (VCMA) effect, potentially driving chaotic dynamics or oscillator death based on the feedback delay and gain of the feedback circuit. The observed chaotic regime has been studied by evaluating the Lyapunov exponent, bifurcation diagrams, Fourier spectral analysis, and reconstruction of the trajectory in embedding phase space. Such observed chaotic dynamics can find practical applications in random number generators and physical reservoir computing.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904832","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":"Critical Behavior, Phenomenological Model, Electrical and Dielectric Properties of La0.67−xPrxBa0.33MnO3 (x = 0.1 and 0.2) Manganites","authors":"Ameni Hidri,&nbsp;Latifa ben ammar,&nbsp;M. Nasri,&nbsp;J. Khelifi,&nbsp;E. K. Hlil","doi":"10.1007/s10948-025-06977-w","DOIUrl":"10.1007/s10948-025-06977-w","url":null,"abstract":"<div><p>In this study, we examined the magnetic and electrical properties of sol–gel-prepared polycrystalline manganites La_{0.67−<i>x</i>}Pr_<i>x</i>Ba_0.33MnO₃ (<i>x</i> = 0.1 and 0.2). The temperature-dependent magnetization reveals that as the temperature decreases, the samples undergo a second-order phase transition from the paramagnetic to the ferromagnetic state. We explore the correlation between experimental findings and theoretical analysis based on phenomenological models that effectively simulate magnetic and magnetocaloric measurements. The predicted maximum magnetic entropy change (Δ<i>S</i>_max) under a 5 T magnetic field is 5.8 J kg⁻¹ K⁻¹ for <i>x</i> = 0.1 and 3.33 J kg⁻¹ K⁻¹ for <i>x</i> = 0.2. Furthermore, we estimate the relative cooling power and specific heat capacity, suggesting that these compounds could be promising candidates for magnetic refrigeration at low temperatures. In addition, the electrical characteristics of La_{0.67−<i>x</i>}Pr_<i>x</i>Ba_0.33MnO₃ (<i>x</i> = 0.1 and <i>x</i> = 0.2) were investigated over a wide range of temperatures (120 to 380 K) and frequencies (40 to 10⁷ Hz) by means of impedance spectroscopy. A transition from semiconducting to metallic behavior is observed at 300 K. Charge carrier hopping between Mn³⁺ and Mn⁴⁺ ions has also been explored with regard to its effects on frequency, temperature, and composition, particularly in relation to permittivity (<i>ε</i>′, <i>ε</i>″) and dielectric loss (tan <i>δ</i>).</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908848","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":"Prediction and Application of Critical Current in 2G HTS Conductors Based on GA-BP Algorithm","authors":"Nipeng Wang,&nbsp;Wenhai Zhou,&nbsp;Rui Liang,&nbsp;Rongli Jia,&nbsp;Bingxu Su,&nbsp;Tingliang Chen,&nbsp;Leiwen Yue,&nbsp;Jiafeng Cao","doi":"10.1007/s10948-025-06975-y","DOIUrl":"10.1007/s10948-025-06975-y","url":null,"abstract":"<div><p>Critical current, as a key parameter distinguishing superconductors from ordinary conductors, determines the stability of superconducting devices and systems during operation. To accurately assess the critical performance of superconductors, a genetic algorithm (GA)–optimized back-propagation (BP) neural network model is introduced and used in this paper to predict the critical currents of second-generation high-temperature superconductors (2G HTS). Firstly, a staged optimization is carried out for the neural network structure and hyper-parameters, and the GA-BP model is established by constructing different fitness functions. Next, the prediction accuracy and generalization ability of the GA-BP model are validated by comparing the relative errors between the predicted values from two models in the 180° to 240° anti-angle region. Eventually, the critical current at a specific temperature is predicted by the GA-BP model, and the corresponding <i>J</i>_<i>c</i>0 is calculated for the finite element calculation of superconducting strips. The calculation results show that the relative error between the maximum current density obtained based on the predicted <i>J</i>_<i>c</i>0 and the experimental <i>J</i>_<i>c</i>0 is only 0.907%, indicating that the model can be used to accurately determine the operating state of the superconducting equipment.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904851","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":"Evidence of Surface Biasing and Multiferroic Properties in Ferroelectric (BNT)-Ferrimagnetic (LFO) Nanocomposites","authors":"Bineet Kumar,&nbsp;Lagen Kumar Pradhan,&nbsp;Amar Dev,&nbsp;Amrish K. Panwar,&nbsp;Manoranjan Kar","doi":"10.1007/s10948-025-06973-0","DOIUrl":"10.1007/s10948-025-06973-0","url":null,"abstract":"<div><p>The lead-free composite (1-x)Bi_0.5Na_0.5TiO₃-(x)LaFeO₃ with chemical composition [<i>x</i> = 0.00, 0.02, 0.04, 0.06, 0.08 and 1.00] has been prepared via the double step solid-state reaction method. The X-ray diffraction (XRD) patterns of the composites indicate its crystalline nature and indexed with rhombohedral (<i>R3c</i>) and orthorhombic (<i>Pbnm</i>) crystal symmetries. The Rietveld refinement of XRD patterns has been used to estimate the various crystal structure parameters. The microstructure of the composites indicates the non-homogeneous distribution of grains with different sizes. The dispersive nature of the frequency dependent dielectric properties is observed in the present composites. The temperature-dependent dielectric constant of the composites exhibits the relaxor behavior. The ferroelectric and magnetic properties of the composites describe its multiferroic behavior. The dielectric, ferroelectric, and magnetic properties of the present composites have been correlated with the multiferroic behavior.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143900718","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":"The Effect of Structural Disorder on Magnetic Properties of Fe-Ga Alloys: Insights from Ab Initio and Monte Carlo Calculations","authors":"M. A. Zagrebin,&nbsp;M. V. Matyunina,&nbsp;Yu. S. Tarasova,&nbsp;V. V. Sokolovskiy,&nbsp;V. D. Buchelnikov","doi":"10.1007/s10948-025-06979-8","DOIUrl":"10.1007/s10948-025-06979-8","url":null,"abstract":"<div><p>In this study, we investigate the effect of structural disorder on structural, elastic, and magnetic properties of Fe<span>(_{100-x})</span>Ga<span>(_x)</span> (<span>(x = 3.7, 5.5, 9.3)</span> at.%) alloys in the <i>A</i>2 phase by means of the density functional theory and Monte Carlo simulations. For each composition of Ga, ten configurations with a random arrangement of non-magnetic atoms in the <i>A</i>2 structure were generated. Calculations performed using the density functional theory have shown that, depending on the localization of atoms in the calculation cell, the calculated equilibrium volume of the unit cell per atom can either increase or decrease, which affects the magnitude of the magnetic moment per Fe atom. The elastic moduli, obtained in this work, has the same trend as observed in experiment. The magnetic exchange interaction between nearest neighbor Fe pair is ferromagnetic and about 22–25 meV. By using the long-range exchange interactions between magnetic atoms in the classical Heisenberg Hamiltonian, we have simulated the temperature dependencies of magnetization for Fe<span>(_{100-x})</span>Ga<span>(_x)</span> alloys at zero magnetic field and estimated Curie temperatures. By using the long-range exchange interactions between magnetic atoms in the classical Heisenberg Hamiltonian, we have simulated the temperature dependencies of magnetization for Fe<span>(_{100-x})</span>Ga<span>(_x)</span> alloys at zero magnetic field. It was shown that the Curie temperature is directly related to the values of the magnetic exchange parameter and demonstrates an increasing dependence. The following results were obtained for the studied compounds: 1138 K for Fe<span>(_{96.3})</span>Ga<span>(_{3.7})</span>, 1185 K for Fe<span>(_{94.5})</span>Ga<span>(_{5.5})</span>, and 1267 K for Fe<span>(_{90.7})</span>Ga<span>(_{9.3})</span>.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892764","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":"Single Crystal Growth and Magnetic Properties of Trigonal Phase HoAl(_{3})","authors":"Junbao He,&nbsp;Xuechao He,&nbsp;Bo Liu,&nbsp;Jianyu Li,&nbsp;Shishi Ma,&nbsp;Xinyue Li,&nbsp;Yu Fu,&nbsp;Congbin Liu,&nbsp;Yuqi Chen,&nbsp;Yongsong Luo,&nbsp;Hui Liang,&nbsp;Hao Shi","doi":"10.1007/s10948-025-06974-z","DOIUrl":"10.1007/s10948-025-06974-z","url":null,"abstract":"<div><p>We have successfully grown single crystalline trigonal-type HoAl<span>(_{3})</span> sample and comprehensively investigated the magnetic and magnetocaloric properties of both the single crystalline and powder samples. Magnetic susceptibility and specific heat measurements reveal that trigonal HoAl<span>(_{3})</span> develops an antiferromagnetic order at <span>(T_{N})</span> = 9 K and this order can be continuously suppressed by an external magnetic field. Influenced by crystal electric field effect, HoAl<span>(_{3})</span> possesses obvious magnetic anisotropy in paramagnetic state. The direction-dependent correlation of magnetic susceptibility, magnetic anomaly under specific magnetic fields, and magnetic field-induced magnetic transition suggest the magnetic easy axis tends to parallel to the <i>ab</i>-plane. The magnetic entropy change in isothermal process reflects that the magnetocaloric effect is almost isotropic.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143879595","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":"Anisotropic Upper Critical Field in Nd1.85Ce0.15CuO4±δ Superconducting Thin Films","authors":"N. Radhikesh Raveendran,&nbsp;Vinita Kumawat,&nbsp;E. P. Amaladass,&nbsp;A. T. Sathyanarayana,&nbsp;T. Geetha Kumary,&nbsp;Awadhesh Mani","doi":"10.1007/s10948-025-06950-7","DOIUrl":"10.1007/s10948-025-06950-7","url":null,"abstract":"<div><p>Thin films of superconducting Nd_1.85Ce_0.15CuO_4±δ were synthesized by a pulsed laser deposition method followed by ex situ annealing in an argon atmosphere. Structural, morphological and electrical characterizations were performed using X-ray diffraction, scanning electron microscopy and temperature-dependent resistivity measurements respectively. X-ray analysis reveals preferential orientation in (001) and (110) directions for the thin films. Resistivity measurements demonstrated a pronounced superconducting behavior in the argon annealed thin films. The critical superconducting properties, the upper critical field and critical current density, were investigated using magneto-transport and magnetization measurements. The anisotropic coefficient which is the ratio of the upper critical field parallel and perpendicular to that of <i>ab</i> plane has been assessed highlighting the significant anisotropy of the Nd_1.85Ce_0.15CuO_4±δ superconductor. The analysis of the activation energy reveals the three-dimensional nature of the vortex lattice in this system.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06950-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"On the Superconducting Critical Temperature of La(_{2-x})Sr(_{x})CuO(_{4})/Sm(_{2})CuO(_4) Superlattice: Polaronic Point of View of Stacking Periodicity Dependence","authors":"B. Ya. Yavidov,&nbsp;S. M. Otajonov,&nbsp;D. E. Uskenbaev,&nbsp;O. K. Ganiev,&nbsp;A. S. Jalekeshov,&nbsp;T. Saparbaev","doi":"10.1007/s10948-025-06978-9","DOIUrl":"10.1007/s10948-025-06978-9","url":null,"abstract":"<div><p>This paper investigates the superconductivity of La<span>(_{2-x})</span>Sr<span>(_{x})</span>CuO<span>(_{4})</span>/Sm<span>(_{2})</span>CuO<span>(_4)</span> superlattices using a theoretical approach based on the extended Holstein model and bipolaronic mechanism for high-temperature superconductivity. We analyzed the dependence of the superconducting critical temperature (<span>(T_c)</span>) on the thickness of the La<span>(_{1.85})</span>Sr<span>(_{0.15})</span>CuO<span>(_4)</span> layer (<span>(d_f)</span>) within the superlattice, which can also be expressed as the number of La<span>(_{1.85})</span>Sr<span>(_{0.15})</span>CuO<span>(_4)</span> half-unit cells (<span>(N_{stc.p})</span>). Our model assumes that the charge carriers in superconducting La<span>(_{1.85})</span>Sr<span>(_{0.15})</span>CuO<span>(_4)</span> layers are bipolarons. We associate high-temperature superconductivity with the superfluidity of the liquid of intersite bipolarons and estimate the superfluidity transition temperature as the Bose-Einstein condensation temperature (<span>(T_{BEC})</span>) of the gas (liquid) of intersite bipolarons. In this way, we directly link the superlattice’s <span>(T_c)</span> with the corresponding Bose-Einstein condensation temperature (<span>(T_{BEC})</span>). Numerical calculations revealed a strong correlation between <span>(T_c)</span> and <span>(T_{BEC})</span>. Importantly, these calculations accurately reproduce the experimental trend of <span>(T_c)</span> with respect to <span>(d_f)</span> or <span>(N_{stc.p})</span>. Our results strongly suggest that strain-induced polaronic effects play a critical role in the superconductivity of La<span>(_{2-x})</span>Sr<span>(_{x})</span>CuO<span>(_{4})</span>/Sm<span>(_{2})</span>CuO<span>(_4)</span> superlattices, further supporting the validity of the bipolaronic model for high-temperature superconductivity in cuprates.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871298","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":"Toward the Detection of Spin-Vortex-Induced Loop Currents in a Single Bilayer Bi(_2)Sr(_2)CaCu(_2)O(_{8+delta }) Thin Film and Their Possible Use as Qubits: Model Calculations for Three Nano-island Architecture","authors":"Hayato Taya,&nbsp;Yuto Takatsu,&nbsp;Hiroyasu Koizumi","doi":"10.1007/s10948-025-06960-5","DOIUrl":"10.1007/s10948-025-06960-5","url":null,"abstract":"<div><p>A theory for cuprate superconductivity predicts the existence of nano-sized loop currents called “spin-vortex-induced loop currents (SVILCs).” In this work, we first calculate magnetic fields produced by them in a single bilayer Bi<span>(_2)</span>Sr<span>(_2)</span>CaCu<span>(_2)</span>O<span>(_{8+delta })</span> (Bi-2212) thin film for the purpose of detecting the SVILCs. The estimated magnitude of the magnetic field at the point 10<i>a</i> (<i>a</i> is the lattice constant of the CuO<span>(_2)</span> plane) above the surface could be in the order of 100 mT; thus, they may be detectable by currently available detection methods. Next, we investigate the use of them as qubits (the “SVILC qubits”) in an architecture composed of three nano-islands of the thin film and consider the use of the detection of the magnetic field generated by the SVILCs as the qubit readout. We show there are a number of energy levels suitable for qubit states that can be manipulated by external current feeding, and the magnetic field generated by the SVILCs is large enough to be used for the readout.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 3","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06960-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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":"Implementation and Readout of Maximally Entangled Two-Qubit Gates Quantum Circuits in a Superconducting Quantum Processor","authors":"V. Stasino,&nbsp;P. Mastrovito,&nbsp;C. Cosenza,&nbsp;A. Levochkina,&nbsp;M. Esposito,&nbsp;D. Montemurro,&nbsp;G. P. Pepe,&nbsp;A. Bruno,&nbsp;F. Tafuri,&nbsp;D. Massarotti,&nbsp;H. G. Ahmad","doi":"10.1007/s10948-025-06968-x","DOIUrl":"10.1007/s10948-025-06968-x","url":null,"abstract":"<div><p>Besides noticeable challenges in implementing low-error single- and two-qubit quantum gates in superconducting quantum processors, the readout technique and analysis are a key factor in determining the efficiency and performance of quantum processors. Being able to efficiently implement quantum algorithms involving entangling gates and asses their output is mandatory for quantum utility. In a transmon-based 5-qubit superconducting quantum processor, we compared the performance of quantum circuits involving an increasing level of complexity, from single-qubit circuits to maximally entangled Bell circuits. This comparison highlighted the importance of the readout analysis and helped us optimize the protocol for more advanced quantum algorithms. Here, we report the results obtained from the analysis of the outputs of quantum circuits using two readout paradigms, referred to as “multiplied readout probabilities” and “conditional readout probabilities.” The first method is suitable for single-qubit circuits, while the second is essential for accurately interpreting the outputs of circuits involving two-qubit gates.</p></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"38 2","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-025-06968-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}