Physics Letters A最新文献_第9页

Study of quasi-one-dimensional Dzyaloshinskii-Moriya interaction in half-monolayer Mn adsorbed stanene 半单层Mn吸附stanene的准一维Dzyaloshinskii-Moriya相互作用研究

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-05 DOI: 10.1016/j.physleta.2026.131343

Yuan Ge , Bingjie Liu , Zhixin Liu , Jiyu Fan , Yanfei Pan , Chunlan Ma , Haixia Ma , Yan Zhu

{"title":"Study of quasi-one-dimensional Dzyaloshinskii-Moriya interaction in half-monolayer Mn adsorbed stanene","authors":"Yuan Ge , Bingjie Liu , Zhixin Liu , Jiyu Fan , Yanfei Pan , Chunlan Ma , Haixia Ma , Yan Zhu","doi":"10.1016/j.physleta.2026.131343","DOIUrl":"10.1016/j.physleta.2026.131343","url":null,"abstract":"<div><div>This work, based on first-principles density functional theory (DFT), proposes a “partial coverage” model that simulates half-monolayer adsorption of Mn atoms on a stanene substrate, forming quasi-one-dimensional Mn atomic chains and inducing a tunable quasi-one-dimensional Dzyaloshinskii-Moriya interaction (DMI). Using first-principles calculations, we investigate the electronic structure and magnetic interactions of this heterostructure. The system exhibits a robust antiferromagnetic (AFM) ground state with pronounced spin-orbit coupling and an indirect-gap semiconducting band structure. In the AFM configuration, the magnetic easy axis is perpendicular to the Mn chain and tilted by 40° with respect to the stanene plane. Through an energy-mapping scheme, we quantitatively extract the Heisenberg exchange couplings and the DMI parameters. The directionality and magnitude of the DMI indicate an intrinsic tendency to form chiral quasi-1D domain walls, offering a theoretical foundation for engineering topological magnetic devices.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131343"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928759","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

A model relating mean squared displacement and angular dynamics in particle motions 一个关于粒子运动中均方位移和角动力学的模型

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-07 DOI: 10.1016/j.physleta.2026.131349

Zhaoke Hao , Ping-Fan Yang , Le Fang

引用次数: 0

Broadband and efficient polarization splitter-rotator based on adiabatic mode evolution on the lithium niobate-on-insulator platform 基于绝缘体上铌酸锂绝热模式演化的宽带高效极化分离器-旋转器

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-09 DOI: 10.1016/j.physleta.2026.131352

Haosheng Xiao , Feng Ye , H.Y. Fu , Qian Li

{"title":"Broadband and efficient polarization splitter-rotator based on adiabatic mode evolution on the lithium niobate-on-insulator platform","authors":"Haosheng Xiao , Feng Ye , H.Y. Fu , Qian Li","doi":"10.1016/j.physleta.2026.131352","DOIUrl":"10.1016/j.physleta.2026.131352","url":null,"abstract":"<div><div>Polarization splitter-rotators (PSRs) are key components for polarization management in high-speed modulators and polarization-division multiplexing systems on the lithium niobate-on-insulator (LNOI) platform. In this work, the particle swarm optimization (PSO) algorithm is introduced to overcome the large-footprint limitation of mode-evolution-based PSRs, demonstrating broadband and efficient PSRs on the LNOI platform. By combining the PSO algorithm, multi-segment design and width topology optimization are respectively implemented to enhance polarization mode conversion efficiency and broaden the bandwidth. Both optimized devices exhibit excellent performance, with insertion loss <0.27 dB, polarization extinction ratio >20 dB, and bandwidth >300 nm. The devices have a length of 300 μm and require only one single-step etching in fabrication. Further analysis confirms the devices exhibit definite fabrication tolerance for width, height, and sidewall angles. The demonstrated methodologies hold potential for extension to other mode-evolution-based integrated photonic devices, enabling the simultaneous achievement of broad bandwidth and compact footprint.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131352"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980052","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

Edge-adaptive curvature-based regularization for robust blind image restoration 基于边缘自适应曲率的正则化鲁棒盲图像恢复

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2025-12-31 DOI: 10.1016/j.physleta.2025.131300

Tingting Zhang , Jiawei Lu , Caiying Wu , Yuping Duan , Jun Liu , Tieyong Zeng , Qiyu Jin , Guoqing Chen , Jean-Michel Morel , Boying Wu , Gabriele Facciolo

{"title":"Edge-adaptive curvature-based regularization for robust blind image restoration","authors":"Tingting Zhang , Jiawei Lu , Caiying Wu , Yuping Duan , Jun Liu , Tieyong Zeng , Qiyu Jin , Guoqing Chen , Jean-Michel Morel , Boying Wu , Gabriele Facciolo","doi":"10.1016/j.physleta.2025.131300","DOIUrl":"10.1016/j.physleta.2025.131300","url":null,"abstract":"<div><div>Blind image deblurring remains challenging in computational imaging due to the unknown blur kernel, often relying on complex priors or heuristic edge selection. This study presents a novel gradient sparsity framework guided by curvature for robust blind image deblurring. By extracting curvature information from image gradients, we design an efficient <em>L</em><sub>1</sub> regularization term to enhance edge retention and image sharpness while minimizing computational overhead. A spatially adaptive edge-weighting function is introduced to dynamically adjust regularization intensity according to local image characteristics, ensuring robust performance across various regions. The optimization problem is decomposed into two convex sub-problems, which are efficiently solved in closed form via the half-quadratic splitting algorithm. Comprehensive experiments on benchmark datasets demonstrate that our approach outperforms cutting-edge methods in both peak signal-to-noise ratio and structural similarity, producing sharper images with reduced artifacts. This framework provides a computationally efficient and robust solution for blind deblurring, especially in resource-constrained environments.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131300"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928757","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

Electrical discharge assisted nitrogen fixation: An alternative to chemical fertilizers 放电辅助固氮：化学肥料的替代品

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-05 DOI: 10.1016/j.physleta.2025.131313

Ekta Yadav, Smrutishree Pratihary, Sneha Latha Kommuguri, Joel Jeevan, Suraj Kumar Sinha

引用次数: 0

Piezoelectric properties of novel group III-VI TiA2×4 (A = Ga, Al; X = S, Se, Te) monolayers: First-principle calculations 新型III-VI族TiA2×4 （A = Ga, Al; X = S, Se, Te）单层材料的压电性能：第一性原理计算

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-12 DOI: 10.1016/j.physleta.2026.131365

Xiuping Guo , Zujun Li , Junhao Peng , Huafeng Dong , Renhai Wang , Yujue Yang , Fugen Wu

{"title":"Piezoelectric properties of novel group III-VI TiA2×4 (A = Ga, Al; X = S, Se, Te) monolayers: First-principle calculations","authors":"Xiuping Guo , Zujun Li , Junhao Peng , Huafeng Dong , Renhai Wang , Yujue Yang , Fugen Wu","doi":"10.1016/j.physleta.2026.131365","DOIUrl":"10.1016/j.physleta.2026.131365","url":null,"abstract":"<div><div>Two-dimensional piezoelectric materials hold tremendous promise for flexible nanoelectronics, owing to their ultra-thin atomic thickness, outstanding mechanical properties, and excellent tunability. In this study, we employ first-principles calculations to systematically investigate the piezoelectric properties of TiA₂X₄ (A = Ga, Al; X = S, Se, Te) monolayers. Our results reveal that the piezoelectric coefficient <em>d</em><sub>11</sub> of monolayer TiA₂X₄ ranges from 5.04 to 7.33 pm/V, showcasing enhanced piezoelectric performance compared to other two-dimensional materials in the MA₂N₄ family, such as MoSi₂N₄ (<em>d</em><sub>11</sub> = 1.145 pm/V) and TiSi₂N₄ (<em>d</em><sub>11</sub> = 0.831 pm/V). This enhanced piezoelectric response is likely attributed to the relatively low elastic constants of TiA₂X₄. The Young’s modulus of the monolayer TiA₂X₄ ranges from 85.4 to 141.76 N/m, suggesting favorable mechanical flexibility. Additionally, we also computed the stability, electronic, and thermodynamics properties of the TiA<sub>2</sub>×<sub>4</sub> (A = Ga, Al; X = S, Se, Te) monolayers. These findings provide crucial insights for the design of TiA<sub>2</sub>×<sub>4</sub> monolayers for applications in flexible nanoelectronic devices and wearable sensors.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131365"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145980053","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

Modulating absorption coefficient and refractive index changes in GaAs quantum rings under the simultaneous influence of temperature, pressure, and Rashba-Dresselhaus spin-orbit couplings 温度、压力和Rashba-Dresselhaus自旋轨道耦合同时影响下GaAs量子环调制吸收系数和折射率的变化

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2025-12-31 DOI: 10.1016/j.physleta.2025.131321

A. Naifar , K. Hasanirokh

引用次数: 0

Design of a double-beam MOT chip based on metasurface 基于超表面的双光束MOT芯片设计

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2025-12-30 DOI: 10.1016/j.physleta.2025.131312

Yong Zeng , Xiang Zhang , Saili Zhao , Feng Zhou , Ruijun Guo , Yang Gao , Bo Yang , Chunfeng Ding , Xiaohong Sun

引用次数: 0

Low frequency topologically protected seismic wave transport using pillared metamaterials 利用柱状超材料的低频拓扑保护地震波传输

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-03 DOI: 10.1016/j.physleta.2026.131333

Jingmei Tan , Pengcheng Ma , Boyang Zhang , Hongwu Yang , Fengming Liu , Pai Peng , Wenshuai Zhang , Qiujiao Du

{"title":"Low frequency topologically protected seismic wave transport using pillared metamaterials","authors":"Jingmei Tan , Pengcheng Ma , Boyang Zhang , Hongwu Yang , Fengming Liu , Pai Peng , Wenshuai Zhang , Qiujiao Du","doi":"10.1016/j.physleta.2026.131333","DOIUrl":"10.1016/j.physleta.2026.131333","url":null,"abstract":"<div><div>Topological insulators (TIs) in condensed matter systems have emerged as promising platforms for guiding waves due to their robust path-defect immunity properties. This work introduces TIs into resonant seismic metamaterials (SMs) for manipulating Rayleigh waves in the low frequency domain, rather than focusing on their band gap properties for attenuating waves. We design hexagonal-lattice SMs with two-pillar unit cells on a soil substrate. Two topological SMs are achieved by breaking C<sub>3v</sub> symmetry via size and height differences, and exhibit the quantum valley Hall effect. A topological edge state (TES) is demonstrated by calculating the band structures of supercell. We construct a topological two-channel system guiding Rayleigh waves to bypass the building, and the displacement field shows that the system can remove >80% of the incident wave energy before it reaches the target building. In conclusion, our topological SM design holds potential for guiding waves and enabling energy harvesting.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131333"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145928715","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

Polarization and mode control in helical LG-beam-driven electron acceleration 螺旋束流驱动电子加速的极化和模式控制

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2026-03-15 Epub Date: 2026-01-08 DOI: 10.1016/j.physleta.2025.131318

Harjit Singh Ghotra

{"title":"Polarization and mode control in helical LG-beam-driven electron acceleration","authors":"Harjit Singh Ghotra","doi":"10.1016/j.physleta.2025.131318","DOIUrl":"10.1016/j.physleta.2025.131318","url":null,"abstract":"<div><div>Theoretical investigation of direct laser acceleration (DLA) of electrons using a helical Laguerre-Gaussian (h-LG) beam is presented. The helical beam of a LG(<em>p, m</em>) beam has zero radial (<em>p</em>) and positively non-zero azimuthal (<em>m</em>) mode indices, which distinguishes it from a fundamental Gaussian beam with (<span><math><mrow><mi>p</mi><mo>=</mo><mn>0</mn><mo>,</mo><mi>m</mi><mo>=</mo><mn>0</mn></mrow></math></span>). The electron laser interaction is found to be sensitive with the distinct (m) index for both linear and circular polarizations of the h-LG beam. It is possible to derive electron dynamics with a combination of electric and magnetic fields, electron phase velocity, electron trajectory, acceleration curve, and overall energy gain by the electron by varying the (m) index of the h-LG beam. The optimum values of beam waist at full width half maximum (FWHM), which contributes to the most energetic electrons in the GeV energy range, are provided for increasing laser power <span><math><mrow><msub><mi>P</mi><mn>0</mn></msub><mo>=</mo><mrow><mo>{</mo><mn>0.5</mn><mo>,</mo><mn>1</mn><mo>,</mo><mn>5</mn><mo>}</mo></mrow></mrow></math></span> PW of h-LG beam. The findings shed new light on vacuum and plasma applications focused on multi-PW h-LG laser beams.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"572 ","pages":"Article 131318"},"PeriodicalIF":2.6,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145979963","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