The European Physical Journal B最新文献

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Deciphering complexity: machine learning insights into the chaos 解读复杂性:机器学习洞察混沌
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2025-01-11 DOI: 10.1140/epjb/s10051-024-00840-y
Lazare Osmanov
{"title":"Deciphering complexity: machine learning insights into the chaos","authors":"Lazare Osmanov","doi":"10.1140/epjb/s10051-024-00840-y","DOIUrl":"10.1140/epjb/s10051-024-00840-y","url":null,"abstract":"<p>We introduce new machine learning techniques for analyzing chaotic dynamical systems. The main goal of this study is to develop a simple method for calculating the Lyapunov exponent using only two trajectory data points, in contrast to traditional methods that require averaging procedures. Additionally, we explore phase transition graphs to analyze the shift from regular periodic to chaotic dynamics, focusing on identifying “almost integrable” trajectories where conserved quantities deviate from whole numbers. Furthermore, we identify “integrable regions” within chaotic trajectories. These methods are tested on two dynamical systems: “two objects moving on a rod” and the “Henon–Heiles” system.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941180","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
Optimizing operational parameters for improved photocatalytic activity of hematite–rGO nanocomposites in methylene blue dye degradation 优化操作参数提高赤铁矿-氧化石墨烯纳米复合材料降解亚甲基蓝染料的光催化活性
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2025-01-10 DOI: 10.1140/epjb/s10051-024-00849-3
Anuradha, Arshdeep Singh, Raj Kumar Seth, Praveen Kumar, Sandeep Kumar
{"title":"Optimizing operational parameters for improved photocatalytic activity of hematite–rGO nanocomposites in methylene blue dye degradation","authors":"Anuradha,&nbsp;Arshdeep Singh,&nbsp;Raj Kumar Seth,&nbsp;Praveen Kumar,&nbsp;Sandeep Kumar","doi":"10.1140/epjb/s10051-024-00849-3","DOIUrl":"10.1140/epjb/s10051-024-00849-3","url":null,"abstract":"<div><p>The α-Fe<sub>2</sub>O<sub>3</sub>/rGO nanocomposites with varying GO concentrations were successfully synthesized utilizing the co-precipitation method followed by annealing. FESEM investigation revealed that the nanocomposites were composed of quasi-spherical α-Fe<sub>2</sub>O<sub>3</sub> nanoparticles with an average particle size of 32.77 nm which were distributed on the wrinkled rGO sheets. Further, the elemental mapping of FESEM confirms that carbon is the dominant component with 66.26 at.%. The nanocomposites were studied for degrading methylene blue dye under varying conditions like photocatalyst load, dye concentration, light intensity, and pH. The photocatalyst load of 0.4 g/L gives the best results at the dye concentration of 5.34 µM. On the other hand, as load and dye concentrations increased further, the nanocomposite’s photocatalytic activity reduced. The nanocomposites were also found to be effective in degrading MB dye molecules under high light intensity and alkaline pH. The impact of operational parameters on nanocomposite’s degrading efficiency was examined in depth by contrasting their deterioration rate constant values, which were derived from the Langmuir–Hinshelwood model. Additionally, a suitable mechanism has been mentioned to explain the outcomes of photocatalytic activity. The highest doped nanocomposite with 0.4 g/L load at 5.34 μM initial dye concentration, high light intensity, and pH 12 had the maximum degradation efficiency of 94%.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941058","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
Spatial and fine energy structure of indirect exciton 间接激子的空间精细能量结构
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2025-01-09 DOI: 10.1140/epjb/s10051-024-00841-x
V. P. Dzyuba, O. B. Vitrik
{"title":"Spatial and fine energy structure of indirect exciton","authors":"V. P. Dzyuba,&nbsp;O. B. Vitrik","doi":"10.1140/epjb/s10051-024-00841-x","DOIUrl":"10.1140/epjb/s10051-024-00841-x","url":null,"abstract":"<div><p>Quantum states of a spatially indirect exciton (IX), including its binding energy, are largely determined by the geometry of the spatial quantum structure consisting of (IX) and the interface (IXI). Unfortunately, this fact has been poorly studied both experimentally and theoretically. In this paper, the parameters of the IXI geometry and their effect on the IX binding energy spectrum are analytically investigated for the first time. For this purpose, the potential of the Coulomb interaction of an electron and a hole is determined using the image method. It is shown that the geometry parameters are quantized, and the effective permittivity of the interface becomes dependent on the orbital and magnetic quantum numbers of IX. A nonlinear dependence of the IX binding energy on the geometric parameters is observed. All these manifestations of the geometry are accessible to experimental observation. Each geometry has its own quantum states. This opens up the possibility of using IXI in exciton spectroscopy of the interface layer. The controllability of the IXI geometry by polarized light allows us to hope for using quantum geometric states of IX as qubits. In this work, various geometric states IX of two planar heterostructures SiO<sub>2</sub>/Si<sub>3</sub>N<sub>4</sub> and GaAs/CdSe were modeled as an example.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939205","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
Effect of weather’s visibility on traffic dynamics: a novel lattice hydrodynamic model for curved roads with passing 天气能见度对交通动力学的影响:一种新的有通行的弯曲道路的点阵水动力模型
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2025-01-06 DOI: 10.1140/epjb/s10051-024-00853-7
Shubham Mehta, Raveena Dangi, Vikash Siwach, Poonam Redhu
{"title":"Effect of weather’s visibility on traffic dynamics: a novel lattice hydrodynamic model for curved roads with passing","authors":"Shubham Mehta,&nbsp;Raveena Dangi,&nbsp;Vikash Siwach,&nbsp;Poonam Redhu","doi":"10.1140/epjb/s10051-024-00853-7","DOIUrl":"10.1140/epjb/s10051-024-00853-7","url":null,"abstract":"<div><p>In this research, we investigate the dynamics of traffic flow on curved roads, considering the impact of visibility and passing maneuvers within the framework of a lattice hydrodynamic model. According to the “density-sensitivity” phase analysis, the stable region continues to grow as visibility decreases on curved roads when passing is considered. The analysis reveals that the stability of traffic flow changes with the angle of the curve corresponding to the lattice point, passing coefficient and visibility factor. The mKdV equation describes the propagating pattern of traffic density waves near the critical points. In comparison to Zhou’s and Nagatani’s models, this new model conveys a greater stable zone. The research discloses that the transition from free flow to kink jam happens at a lower passing rate and within the kink jam area, initial perturbations manifest as a kink-antikink wave moving backwards, with decreasing the amplitude of the density profile as the visibility coefficient rises. To verify the theoretical findings, “numerical simulation” has been conducted to examine how the traffic flow evolves in the presence of small disturbances. The analytical results for different passing rates have been discussed, and the effect of visibility on the angle of the curve at a fixed value has been observed. Both numerical simulations and analytical results highlight that visibility with a passing effect on curved roads can efficiently reduce traffic jams.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939070","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
Exciton states and interband absorption spectra in quantum wells using a variationally optimized diagonalization method 利用变分优化对角化方法研究量子阱中的激子态和带间吸收光谱
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2025-01-06 DOI: 10.1140/epjb/s10051-024-00854-6
Shudong Wu
{"title":"Exciton states and interband absorption spectra in quantum wells using a variationally optimized diagonalization method","authors":"Shudong Wu","doi":"10.1140/epjb/s10051-024-00854-6","DOIUrl":"10.1140/epjb/s10051-024-00854-6","url":null,"abstract":"<div><p>Previous studies on excitons in quantum wells (QWs) have widely focused on the ground exciton state based on the variational method with the trial wave function. Moreover, it is progressively more difficult to use to find the energies of the excited exciton states. Using a variationally optimized diagonalization method based on a two-dimensional (2D) nonorthogonal Laguerre basis set, we theoretically investigate exciton states and interband absorption spectra with various electron and hole subband indices in QWs with finite potential barriers. The maximum relative error up to <span>(10^{ - 4})</span> is obtained at the basis size <span>(N = 3)</span>, which indicates that the use of <span>(N = 10)</span> in the basis size is enough large to get the excellent results. Therefore, the 2D nonorthogonal Laguerre basis set is an excellent choice for quasi-2D semiconductor structures. For (<i>n</i><sub><i>e</i></sub> = 2,<i> n</i><sub><i>h</i></sub> = 2) exciton in narrow QWs, there are some small inevitable fluctuations in exciton binding energy and oscillator strength due to the interference between the exciton wave functions in the well and barrier layers. It is clear that sharp interband absorption peaks of HH and LH excitons with <i>n</i><sub><i>e</i></sub> = <i>n</i><sub><i>h</i></sub> = 1 and <i>n</i><sub><i>e</i></sub> = <i>n</i><sub><i>h</i></sub> = 2 can be observed, and distinctive additional small peaks e1-HH1 (2<i>s</i>), e1-HH1 (3<i>s</i>), e1-LH1 (2<i>s</i>), e1-LH1 (3<i>s</i>), e2-HH2 (2<i>s</i>), e2-HH2 (3<i>s</i>), e2-LH2 (2<i>s</i>) and e2-LH2 (3<i>s</i>) excitons are resolved on the high-energy side of each 1<i>s</i> exciton peak in the spectrum. Our results are in good agreement with those obtained from the variational method and the experimental results.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142939069","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
First-principles study of the electronic structure and optical properties of Eu2+ and Mn2+-doped NaLi3SiO4 phosphor Eu2+和Mn2+掺杂NaLi3SiO4荧光粉的电子结构和光学性质的第一性原理研究
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-12-30 DOI: 10.1140/epjb/s10051-024-00839-5
Zhengxian Liu, Jiaolian Luo, Anqi Yang, Zhenyu Xie, Lifang He, Mingzhao Tan
{"title":"First-principles study of the electronic structure and optical properties of Eu2+ and Mn2+-doped NaLi3SiO4 phosphor","authors":"Zhengxian Liu,&nbsp;Jiaolian Luo,&nbsp;Anqi Yang,&nbsp;Zhenyu Xie,&nbsp;Lifang He,&nbsp;Mingzhao Tan","doi":"10.1140/epjb/s10051-024-00839-5","DOIUrl":"10.1140/epjb/s10051-024-00839-5","url":null,"abstract":"<div><p>Based on the plane-wave pseudopotential method of density functional theory, it calculates and compares the electronic structure and optical properties of NaLi<sub>3</sub>SiO<sub>4</sub> before and after doping with Eu<sup>2+</sup> and Mn<sup>2+</sup>. It investigates the feasibility of using Eu<sup>2+</sup> and Mn<sup>2+</sup>-doped NaLi<sub>3</sub>SiO<sub>4</sub> phosphor in the design of resin-phosphor-resin layered films for transparent display (TD) screens. The electronic structure analysis indicates that NaLi<sub>3</sub>SiO<sub>4</sub> is an indirect bandgap compound with a bandgap value of 4.56 eV, capable of sustaining the energy difference between the ground state and the excited state of activator ions. Doping with Eu<sup>2+</sup> and Mn<sup>2+</sup> increases the crystal volume, reduces the bandgap, and results in a more compact band structure, making it easier for electrons to transition from the valence band to the conduction band. According to the optical properties analysis, NaLi<sub>3</sub>SiO<sub>4</sub> is an excellent transparent material in visible and infrared light regions. Doping with Eu<sup>2+</sup> and Mn<sup>2+</sup> enhances the light absorption capacity of NaLi<sub>3</sub>SiO<sub>4</sub> in the 0–5 eV energy range. Combined with its refractive index and reflectivity, it is evident that NaLi<sub>3</sub>SiO<sub>4</sub>: Eu<sup>2+</sup> and NaLi<sub>3</sub>SiO<sub>4</sub>: Mn<sup>2+</sup> phosphors exhibit good transparency in the visible light region. Therefore, they can become critical materials for designing resin–phosphor–resin layered films for TD screens.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905990","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
DFT exploration of structural, optoelectronic, thermoelectric and mechanical properties of Protactinium-Based Oxide Perovskites APaO3 (A = Li, Na, K) for optoelectronic applications APaO3 (A = Li, Na, K)的结构、光电、热电和力学性能的DFT探索
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-12-29 DOI: 10.1140/epjb/s10051-024-00847-5
Muhammad Awais, Fayyaz Hussain, Niaz Ahmad Niaz, Abdul Shakoor, Khalid Nadeem Riaz, Umair Mumtaz, Farooq Ahmad, Muhammad Shafiq, Manawwer Alam, Rizwan Wahab
{"title":"DFT exploration of structural, optoelectronic, thermoelectric and mechanical properties of Protactinium-Based Oxide Perovskites APaO3 (A = Li, Na, K) for optoelectronic applications","authors":"Muhammad Awais,&nbsp;Fayyaz Hussain,&nbsp;Niaz Ahmad Niaz,&nbsp;Abdul Shakoor,&nbsp;Khalid Nadeem Riaz,&nbsp;Umair Mumtaz,&nbsp;Farooq Ahmad,&nbsp;Muhammad Shafiq,&nbsp;Manawwer Alam,&nbsp;Rizwan Wahab","doi":"10.1140/epjb/s10051-024-00847-5","DOIUrl":"10.1140/epjb/s10051-024-00847-5","url":null,"abstract":"<div><p>In recent years, there has been a bolstering inclination towards the exploration of ternary perovskite oxide materials, owing to their extensive utilization in optoelectronic appliances. The potential for improving optoelectronic devices is examined in this study by examining the effects of the substitution of Li and Na cations at the A-site of KPaO<sub>3</sub> oxide perovskite. This article provides a thorough investigation using the density functional theory (DFT) for the structural, optoelectronic, thermoelectric and mechanical behavior of APaO<sub>3</sub> (A = Li, Na, and K). Different approximations, including Perdew–Bruke–Ernzerhof generalized gradient approximation (PBE-GGA), Trans-Balha Modified Becke-Johnson (TB-mBJ), and Local Spin Density Approximation (LSDA), were employed in finding out the bandgap of APaO<sub>3</sub> (A = Li, Na, and K). LiPaO<sub>3</sub> and NaPaO<sub>3</sub> possess a direct bandgap, whereas KPaO<sub>3</sub> possesses an indirect bandgap upon implementation of all potentials. It is reported that all materials have a wide bandgap (&gt; 3 eV) and semi-conducting nature. To comprehend the optical and thermoelectric behavior of the investigated materials optical and thermoelectric properties are enumerated for the mentioned materials. Our current study offers a significant roadmap to determine structural, optoelectronic, thermoelectric and mechanical characteristics to help researchers better understand a range of physical phenomena and to urge device designers to use these materials in Optoelectronic and thermoelectric devices.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890071","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 effects of δ-doping on GMR in 2DEG modulated with two ferromagnetic stripes of center misalignment δ掺杂对中心错位两条铁磁条纹调制的2DEG中GMR的影响
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-12-27 DOI: 10.1140/epjb/s10051-024-00844-8
Xingrong Zheng, Feifei Li
{"title":"The effects of δ-doping on GMR in 2DEG modulated with two ferromagnetic stripes of center misalignment","authors":"Xingrong Zheng,&nbsp;Feifei Li","doi":"10.1140/epjb/s10051-024-00844-8","DOIUrl":"10.1140/epjb/s10051-024-00844-8","url":null,"abstract":"<p>Using high precision numerical calculations with an improved transfer matrix method, we calculated the transmission probabilities, the conductance, as well as the modified giant magnetoresistance ratio with <i>δ</i>-doping in several GMR model devices. We also obtained the spectrum of the giant magnetoresistance ratio as a function of the Fermi energy, the dependence of the peak magnetoresistance ratio value, and its Fermi energy position on the weight and the position of the <i>δ</i>-doping. The results are then compared with the previous theoretical calculations and experimental data. The results shows that our results are better than previous theoretical calculations results, and pointed out that some mistakes must be made during the previous theoretical calculation for physical quantities of GMR devices in anti-parallel alignment.</p><p>In this work, using high precision numerical calculations and the improved transfer matrix method, we calculated the transmission probability, conductance and magnetoresistance ratio(MRR) with δ-doping in 2DEG modulated with two ferromagnetic stripes of center misalignment, and then obtain the dependence of the peak MRR value and its Fermi energy position on the δ-doping weight and position. Furthermore, the results are then compared with the previous theoretical calculations and experimental data. Our results are better than previous theoretical calculations results, and are completely consistent with the experimental results by comparison. This improved method is general, and it is demonstrated very fast for evaluating various spin-dependent transport properties and magnetoresistance ratio in complex hybrid magnetic-electric structures.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889626","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
Magnetic quantum behavior of surface-doped three-layer graphene-like system based on spin wave theory 基于自旋波理论的表面掺杂三层类石墨烯体系的磁量子行为
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-12-27 DOI: 10.1140/epjb/s10051-024-00818-w
Qing Xin, Anbang Guo, Yanan Xie, Ran Bao, Wei Jiang, Mingcheng Wei
{"title":"Magnetic quantum behavior of surface-doped three-layer graphene-like system based on spin wave theory","authors":"Qing Xin,&nbsp;Anbang Guo,&nbsp;Yanan Xie,&nbsp;Ran Bao,&nbsp;Wei Jiang,&nbsp;Mingcheng Wei","doi":"10.1140/epjb/s10051-024-00818-w","DOIUrl":"10.1140/epjb/s10051-024-00818-w","url":null,"abstract":"<div><p>The spin wave spectra and magnetic moments of a surface-doped graphene-like structure, composed of eight distinct atoms are studied, taking spin quantum number and temperature into account. The results show that the model has a total of eight spin wave spectra and three energy gaps and We note that the magnetic moments intersect at low temperatures, which can be attributed to quantum fluctuations. Therefore, we explore the influence of different magnetic parameters on quantum fluctuations within a three-layer model. The result shows that, in comparison to interlayer exchange coupling, intra-layer exchange coupling has a more pronounced influence on the quantum fluctuation within the three-layer model. Magnetocrystalline anisotropy of different acting forms has opposite effects on quantum fluctuation, The magnetocrystalline anisotropy inside the antiferromagnetic layer has the most obvious effect on the quantum fluctuation of the model. The quantum fluctuation values of the two sublattices in the ferromagnetosphere differ very little.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889627","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
Analogous electromagnetically induced transparency with multiband on metasurfaces 超表面多波段类似电磁感应透明
IF 1.6 4区 物理与天体物理
The European Physical Journal B Pub Date : 2024-12-24 DOI: 10.1140/epjb/s10051-024-00845-7
Renxia Ning, Xueyan Zheng, Qi Liu, Ningye He, Yuan Xu
{"title":"Analogous electromagnetically induced transparency with multiband on metasurfaces","authors":"Renxia Ning,&nbsp;Xueyan Zheng,&nbsp;Qi Liu,&nbsp;Ningye He,&nbsp;Yuan Xu","doi":"10.1140/epjb/s10051-024-00845-7","DOIUrl":"10.1140/epjb/s10051-024-00845-7","url":null,"abstract":"<div><p>In this paper, a metasurface structure with dual-layer structure was designed. Two vertical metal bars and three U-shaped metal patterns are prepared on substrate of printed circuit board (PCB). By analyzing the transmission comparison with partial of the structure, it was analyzed that the reason for the multiband analogous electromagnetically induced transparency (EIT) of the structure is obtained by multimode coupling, and the resonance mechanism of the structure was analyzed by multipole scattering theory. By analyzing the electric field distribution of the structure, the physical mechanism of analogous EIT generation of the structure is obtained. The influence of the structure parameters on analogous EIT phenomena is further analyzed. By comparing the measured results with the calculated results in a microwave anechoic chamber, the results are in good agreement. The structure has potential applications in multiband filter, refractive index sensor, and microwave devices.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880534","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
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