Physics Letters A最新文献

Diverse magnetic phase transition and magnetic characteristic in La1/3Sr1/3M1/3CoO3 (M = Ca, Ba) La1/3Sr1/3M1/3CoO3 （M = Ca, Ba）的不同磁相变和磁特性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-16 DOI: 10.1016/j.physleta.2025.130652

Ruiju Zhang , Gang Wu , Xiao Jiang , Wei Tong , Jiyu Fan

引用次数: 0

Photoelectric simulation of perovskite solar cells based on two inverted pyramid structures 基于两个倒金字塔结构的钙钛矿太阳能电池的光电模拟

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-14 DOI: 10.1016/j.physleta.2025.130653

Yongjing Liu , Mengsi Liu , Hua Yang , Zao Yi , Han Zhang , Chaojun Tang , Juan Deng , Junqiao Wang , Boxun Li

{"title":"Photoelectric simulation of perovskite solar cells based on two inverted pyramid structures","authors":"Yongjing Liu , Mengsi Liu , Hua Yang , Zao Yi , Han Zhang , Chaojun Tang , Juan Deng , Junqiao Wang , Boxun Li","doi":"10.1016/j.physleta.2025.130653","DOIUrl":"10.1016/j.physleta.2025.130653","url":null,"abstract":"<div><div>The reduction of the optical and electrical losses in perovskite solar cells (PSCs) is pivotal to enhancing their overall efficiency. According to the light trapping effect and the enhancement of electron transport capacity, we propose a perovskite solar cell based on two inverted pyramid structures through numerical simulation. The etching of inverted pyramids in fluorine doped SnO<sub>2</sub> (FTO) layer structure is a strategy employed to enhance the absorption of perovskite solar light, thereby optimizing the photoelectric performance of the cell. The TiO<sub>2</sub> inverted pyramid structure was introduced beneath the electron transport layer TiO<sub>2</sub>, thereby altering the contact interface between the light absorption layer CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> and the electron transport layer. This modification resulted in an increased contact area and enhanced electron transport capability. Furthermore, a comparative analysis was conducted on the photoelectric characteristics of PSCs with planar type, only TiO<sub>2</sub> inverted pyramid structure, only FTO etching inverted pyramid structure, and PSCs with both inverted pyramid structures. The results of this study indicate that the cell with these two inverted pyramid structures exhibits optimal photoelectric performance, characterized by a maximum short-circuit current density of 23.81 mA/cm<sup>2</sup>, a power conversion efficiency of 19.73 %, and an overall thickness of 1200 nm. These findings offer valuable insights for the subsequent design of high-performance PSCs.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"552 ","pages":"Article 130653"},"PeriodicalIF":2.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144071201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Families of nonlinear Schrödinger equations in general form with exact solutions 具有精确解的一般形式的非线性Schrödinger方程族

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-14 DOI: 10.1016/j.physleta.2025.130648

Nikolay A. Kudryashov

{"title":"Families of nonlinear Schrödinger equations in general form with exact solutions","authors":"Nikolay A. Kudryashov","doi":"10.1016/j.physleta.2025.130648","DOIUrl":"10.1016/j.physleta.2025.130648","url":null,"abstract":"<div><div>The family of nonlinear Schrödinger equations in its the general form is considered. These nonlinear partial differential equations depend on arbitrary functions, and the Cauchy problems for them are not solved by the inverse scattering transform in the general case. However, we demonstrate that a few families of nonlinear Schrödinger equations admit the generalized traveling wave solutions. Our approach relies on functions satisfying first- and second-order differential equations. In fact, these functions can be considered as the results of experimental measurements of pulses in a nonlinear medium. Thus, the proposed approach can be seen as an attempt to define a mathematical model based on measurement results. In this paper we use solutions of first-order ordinary differential equations with known forms. This idea allows us to find a condition on arbitrary functions. In this case, one constraint is imposed on arbitrary functions that determines the family of nonlinear partial differential equations under consideration. Four families of new nonlinear Schrödinger equations are presented, which admit generalized traveling wave solutions expressed in terms of elementary functions.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"552 ","pages":"Article 130648"},"PeriodicalIF":2.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Positon and breather positon solutions for the nonlocal higher-order Chen-Lee-Liu equation 非局部高阶Chen-Lee-Liu方程的位置解和呼吸位置解

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-13 DOI: 10.1016/j.physleta.2025.130630

Jiajie Wu, Yi Zhang, Xiangyun Wang, Jianan Wang

引用次数: 0

Structural, stability and electronic properties of A7 SbAs rhombohedral phase under pressure variations 压力变化下A7 SbAs菱面体相的结构、稳定性和电子性能

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-13 DOI: 10.1016/j.physleta.2025.130636

Lengai Julius Nambua , Refilwe Edwin Mapasha , Stanley Ferdinand Mwanga , Vijay Singh

{"title":"Structural, stability and electronic properties of A7 SbAs rhombohedral phase under pressure variations","authors":"Lengai Julius Nambua , Refilwe Edwin Mapasha , Stanley Ferdinand Mwanga , Vijay Singh","doi":"10.1016/j.physleta.2025.130636","DOIUrl":"10.1016/j.physleta.2025.130636","url":null,"abstract":"<div><div>Antimony arsenide (SbAs), a bulk 3D binary compound has attracted significant interest since its experimental discovery in 2013. This is due to its potential applications in fields such as electronics, topological insulators, optoelectronics, thermoelectrics, and piezoelectrics. In the A7 rhombohedral phase, SbAs manifests a pseudo-layered structure with interlayer interactions mediated by weak van der Waals forces. In the present work, we have employed first-principles calculations to investigate the pressure-dependent structural, stability, and electronic properties of SbAs in the A7 phase. Our results indicate that the lattice parameter along the <em>a</em>-axis shows a continuous reduction under pressure, whereas, the <em>c</em>-axis evolves with anisotropic compression. Bond lengths and bond angles decrease systematically with a linear trend emerging above 60 GPa like the lattice parameters. Symmetry analysis shows a pressure-induced phase transition from the non-centrosymmetric space group <em>R3m</em> to the centrosymmetric <em>R</em><span><math><mover><mrow><mn>3</mn></mrow><mo>‾</mo></mover></math></span><em>m</em>. Phonon dispersion relations show a lack of imaginary modes at ambient pressure, but the onset of instability is observed between 20 and 40 GPa, with the appearance of imaginary modes that decrease in intensity from the former to the latter stated pressure point. However, these modes dissipate from around 60 GPa and above signifying the material's dynamic stability at high pressures. On the electronic front, SbAs exhibits a transition from a semimetallic to a metallic state with increasing pressure accompanied by a rise in the Fermi energy. Furthermore, spin-orbit coupling (SOC) has also been observed to play a significant role in the material's electronic characteristics.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"552 ","pages":"Article 130636"},"PeriodicalIF":2.3,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Energy spectrum of lost alpha particles in magnetic mirror confinement 磁镜约束下丢失α粒子的能谱

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-13 DOI: 10.1016/j.physleta.2025.130631

Alejandro Mesa Dame , Ian E. Ochs , Nathaniel J. Fisch

引用次数: 0

The robustness of the Buz̆ek-Hillery copy machine Buz - ek-Hillery复印机的坚固性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-12 DOI: 10.1016/j.physleta.2025.130633

A.R. Mohammed , N. Metwally

引用次数: 0

Polarization-insensitive ultra-broadband terahertz metamaterial absorber using vanadium dioxide and graphene 使用二氧化钒和石墨烯的偏振不敏感超宽带太赫兹超材料吸收体

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-12 DOI: 10.1016/j.physleta.2025.130632

Mengjie Cui, Guanmao Zhang, Kaiyun Bi, Bochuan Xing, Guangchao Diao, Yuze Du, Zhilin Ge, Yinqiao Zhang

{"title":"Polarization-insensitive ultra-broadband terahertz metamaterial absorber using vanadium dioxide and graphene","authors":"Mengjie Cui, Guanmao Zhang, Kaiyun Bi, Bochuan Xing, Guangchao Diao, Yuze Du, Zhilin Ge, Yinqiao Zhang","doi":"10.1016/j.physleta.2025.130632","DOIUrl":"10.1016/j.physleta.2025.130632","url":null,"abstract":"<div><div>Metamaterial broadband absorbers have attracted significant attention due to their unique ability to manipulate electromagnetic waves in the terahertz (THz) regime. In this study, a thermally tunable ultra-broadband THz absorber is proposed by integrating patterned vanadium dioxide (<figure><img></figure>) and graphene. Leveraging the reversible phase-transition characteristics of <figure><img></figure>, the absorber enables dynamic switching between ultra-broadband and multi-band absorption modes. In the metallic phase, the absorber exhibits a remarkable absorption bandwidth ranging from 4.08 to 35.25 THz, exceeding most previously reported THz absorbers. The absorption intensity can be continuously tuned from 8.4% to 99.9% through thermal modulation. Owing to its symmetric design, the absorber demonstrates polarization insensitivity and maintains an average absorption above 85% under oblique incidence up to <span><math><msup><mrow><mn>60</mn></mrow><mrow><mo>∘</mo></mrow></msup></math></span>. Furthermore, the absorption performance remains robust against variations in ambient refractive index. The proposed absorber holds strong potential for advanced applications in electromagnetic stealth, biomedical imaging, and terahertz sensing systems.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"552 ","pages":"Article 130632"},"PeriodicalIF":2.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Interplay between topology and fractality of the hofstadter butterfly 霍夫施塔特蝴蝶拓扑与分形的相互作用

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-12 DOI: 10.1016/j.physleta.2025.130635

Indubala I. Satija

引用次数: 0

Crossover from BKT to first-order transition induced by higher-order terms in 2D XY models 二维XY模型中由高阶项引起的从BKT到一阶跃迁的交叉

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-05-12 DOI: 10.1016/j.physleta.2025.130627

Milan Žukovič

{"title":"Crossover from BKT to first-order transition induced by higher-order terms in 2D XY models","authors":"Milan Žukovič","doi":"10.1016/j.physleta.2025.130627","DOIUrl":"10.1016/j.physleta.2025.130627","url":null,"abstract":"<div><div>We study phase transitions in <em>XY</em> models, generalized by inclusion of <em>n</em> higher-order pairwise interactions of equal strength, by Monte Carlo simulation. It is found that by adding new terms the Berezinskii-Kosterlitz-Thouless (BKT) transition, observed in the standard <em>XY</em> model, gradually changes to the first-order phase transition. We determine the critical number of terms for which the first-order transition appears as <span><math><msub><mrow><mi>n</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>=</mo><mn>6</mn></math></span>. It is also found that for <span><math><mi>n</mi><mo>=</mo><mn>5</mn></math></span> the transition is pseudo-first-order but it becomes true first-order if the couplings are allowed to increase. In general, a more rapid increase of the coupling intensity supports the first-order transition, however, a too fast increase may result in splitting of the single transition to multiple transitions. Consequently, the minimal number of the terms required for the change of the BKT phase transition to first order in the present model with arbitrary couplings is estimated to be <span><math><mn>2</mn><mo><</mo><msub><mrow><mi>n</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>≤</mo><mn>5</mn></math></span>.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"552 ","pages":"Article 130627"},"PeriodicalIF":2.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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