Physics Letters A最新文献

Probabilistic coherence transformation under strictly incoherent operation 严格非相干操作下的概率相干变换

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-11 DOI: 10.1016/j.physleta.2025.130739

Ao-Xiang Liu , Cong-Feng Qiao

引用次数: 0

The Ablowitz-Ladik equation featuring two time-varying coefficients: Continuum limit, modulation instability, novel localized wave solutions and related dynamics 具有两个时变系数的Ablowitz-Ladik方程：连续统极限、调制不稳定性、新的局域波解和相关动力学

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-10 DOI: 10.1016/j.physleta.2025.130735

Ting Zhang, Xiao-Yong Wen

{"title":"The Ablowitz-Ladik equation featuring two time-varying coefficients: Continuum limit, modulation instability, novel localized wave solutions and related dynamics","authors":"Ting Zhang, Xiao-Yong Wen","doi":"10.1016/j.physleta.2025.130735","DOIUrl":"10.1016/j.physleta.2025.130735","url":null,"abstract":"<div><div>This letter addresses the Ablowitz-Ladik equation featuring two time-varying coefficients. Initially, we investigate its continuum limit and modulation instability. Subsequently, we extend the generalized <span><math><mo>(</mo><mi>p</mi><mo>,</mo><mi>N</mi><mo>−</mo><mi>p</mi><mo>)</mo></math></span>-fold Darboux transformation to this variable-coefficient equation, from which we derive a variety of exact solutions such as breather, rogue wave, periodic wave, as well as their combined interaction solutions with two time-varying coefficients on diverse seed backgrounds, and their localized wave structures are analyzed and discussed graphically. Intriguingly, due to the effects of variable coefficients and control parameters, we discover that a fundamental rogue wave characterized by a single peak and two valleys can be divided into two fundamental rogue waves, and we further obtain a novel rogue wave situated on a kink soliton background, while these new phenomena cannot be found in the constant coefficient Ablowitz Ladik equation. These innovative discoveries will broaden our understanding of particular physical phenomena in optical fiber.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130735"},"PeriodicalIF":2.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253603","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

Spin filter effect in heterojunction construct by (3,0) dehydrogenation DNTs/CNTs （3,0）脱氢DNTs/CNTs异质结构建中的自旋过滤效应

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-10 DOI: 10.1016/j.physleta.2025.130743

MingJun Li , Jiao Huang , MengQiu Long , Can Cao

{"title":"Spin filter effect in heterojunction construct by (3,0) dehydrogenation DNTs/CNTs","authors":"MingJun Li , Jiao Huang , MengQiu Long , Can Cao","doi":"10.1016/j.physleta.2025.130743","DOIUrl":"10.1016/j.physleta.2025.130743","url":null,"abstract":"<div><div>(3,0) Diamond nanothreads (DNTs) have recently emerged as a pioneering class of ordered sp<sup>3</sup> nanomaterials, synthesized through kinetic control of high-pressure solid-state reactions. As a versatile material exhibiting exceptional mechanical properties, DNTs demonstrate significant potential for device applications, particularly in complex environments. Utilizing first-principles simulations, we have demonstrated that the partial dehydrogenation of (3,0)DNTs enable tuning the electrical and magnetic properties. Remarkably, the material can undergo transition from semiconductor to half-metal and back to semiconductor states by altering the position of dehydrogenation. The potential for spin devices based on dehydrogenation (3,0)DNTs represents a promising avenue. Our results reveal the feasibility of achieving spin-polarized currents exceeding 99 % and distinctive negative differential resistance characteristics. Furthermore, the spin current can be effectively modulated by adjusting the unit number of partial dehydrogenation in (3,0)DNTs. These findings strongly suggest that DNTs-based devices could pave a new way for an ideal spin device in complex surroundings.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130743"},"PeriodicalIF":2.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298417","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

Rogue waves of the nonlinear Schrödinger equation with an external linear potential in waveguides with Helmholtz resonators: Transmission-line approach 亥姆霍兹谐振器波导中具有外部线性势的非线性Schrödinger方程的异常波：在线传输方法

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-10 DOI: 10.1016/j.physleta.2025.130737

Alphonse Houwe , Souleymanou Abbagari , Lanre Akinyemi , Doka Yamigno Serge

{"title":"Rogue waves of the nonlinear Schrödinger equation with an external linear potential in waveguides with Helmholtz resonators: Transmission-line approach","authors":"Alphonse Houwe , Souleymanou Abbagari , Lanre Akinyemi , Doka Yamigno Serge","doi":"10.1016/j.physleta.2025.130737","DOIUrl":"10.1016/j.physleta.2025.130737","url":null,"abstract":"<div><div>This study explores rational soliton solutions in an acoustic waveguide system incorporating Helmholtz resonators, modeled using a transmission-line approach. A perturbation technique is used to derive a cubic-quintic nonlinear Schrödinger equation with a linear external potential. Analytical investigations consider various forms of the linear potential, including constant linear density, temporally periodic modulation, and exponentially growing or decaying profiles, to examine the characteristics of first- and second-order rogue waves. By analyzing the combined influence of wavenumber and the different external potentials, it is observed that the typical features of rogue waves such as crests, humps, and holes disappear under certain conditions. Furthermore, for sufficiently high wavenumber values, the Peregrine soliton transitions into a composite bright-dark soliton structure. Finally, a modulation instability analysis is conducted to identify both stable and unstable modes within specific angular frequency ranges.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130737"},"PeriodicalIF":2.3,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270141","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

Ultra-broadband perfect light absorber based on circular truncated cone structure Ti3C2Tx MXene across the visible to near-infrared region 基于圆形截锥结构的Ti3C2Tx MXene超宽带完美光吸收器横跨可见光至近红外区域

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-09 DOI: 10.1016/j.physleta.2025.130742

Bingzhen Li, Qingqing Wu, Fangyuan Li, Yan Li, Xiao Zhou, Songlin Yu, Wangjun Ren, Jijun Wang

{"title":"Ultra-broadband perfect light absorber based on circular truncated cone structure Ti3C2Tx MXene across the visible to near-infrared region","authors":"Bingzhen Li, Qingqing Wu, Fangyuan Li, Yan Li, Xiao Zhou, Songlin Yu, Wangjun Ren, Jijun Wang","doi":"10.1016/j.physleta.2025.130742","DOIUrl":"10.1016/j.physleta.2025.130742","url":null,"abstract":"<div><div>Broadband perfect light absorbers (PLAs) are critical for advancing technologies such as stealth systems, thermal photovoltaics, and optical imaging, where efficient, spectrum-wide light absorption is essential. Here, we propose a novel, low-cost PLA design featuring a circular truncated cone (CTC) nanostructure composed of Ti₃C₂T<sub>x</sub> MXene. Finite element method (FEM) simulations reveal exceptional performance, with over 99.5 % average absorbance across 280–1623 nm and a 141.1 % relative bandwidth, validated by equivalent circuit modeling (ECM). This efficiency stems from synergistic interactions between guided mode excitation, localized surface plasmon resonances (LSPRs), and intrinsic losses within the CTC geometry. The design maintains >99 % absorption, exhibiting polarization- and angle-insensitivity for transverse electric/magnetic modes, while geometric tunability enables customization for diverse applications, including solar harvesting, thermoelectrics, and thermal imaging. This work advances PLA technology by delivering ultra-broadband, robust, and adaptable absorption, addressing key limitations in existing designs.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130742"},"PeriodicalIF":2.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270144","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

Defects which create trap states in electronic structure of CsSnI3 surface CsSnI3表面电子结构中产生陷阱态的缺陷

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-09 DOI: 10.1016/j.physleta.2025.130744

Zedong Lin , Pengfei Wu , Wenyong Feng , Yiwen Wang , Zhilin Chen , Changqing Lin

{"title":"Defects which create trap states in electronic structure of CsSnI3 surface","authors":"Zedong Lin , Pengfei Wu , Wenyong Feng , Yiwen Wang , Zhilin Chen , Changqing Lin","doi":"10.1016/j.physleta.2025.130744","DOIUrl":"10.1016/j.physleta.2025.130744","url":null,"abstract":"<div><div>To enhance the power conversion efficiency (PCE) of Sn-based perovskite solar cells (PSCs), it is essential to identify defects that act as nonradiative recombination centers. Using density functional theory calculations on the energetically favored (110) CsSnI<sub>3</sub> surface, we demonstrate that trap state formation depends on the defect type and surface termination. Specifically, SnI defects generate shallow trap states near the conduction band in CsI-terminated surfaces, while leading to both deep and shallow states in SnI<sub>2</sub>-terminated surfaces. V<sub>Cs</sub> defects create a broad region of trap states in CsI-terminated surfaces but fail to do so in SnI<sub>2</sub>-terminated surfaces. Similarly, V<sub>Sn</sub> defects produce a wide range of trap states in CsI-terminated surfaces, with none in SnI<sub>2</sub>-terminated surfaces. Our analysis reveals that trap states arise from local structural changes around the defect site. Therefore, regulating surface termination and suppressing defect formation are crucial for reducing nonradiative recombination and improving PSC performance.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130744"},"PeriodicalIF":2.3,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289203","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

Giant piezoelectric response near the uniaxial stress induced tricritical point in Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 Pb(Mg1/3Nb2/3) O3-0.3PbTiO3在单轴应力诱导三临界点附近的巨大压电响应

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-08 DOI: 10.1016/j.physleta.2025.130741

Manli Cai, Wenhui Ma

{"title":"Giant piezoelectric response near the uniaxial stress induced tricritical point in Pb(Mg1/3Nb2/3)O3–0.3PbTiO3","authors":"Manli Cai, Wenhui Ma","doi":"10.1016/j.physleta.2025.130741","DOIUrl":"10.1016/j.physleta.2025.130741","url":null,"abstract":"<div><div>We report intriguing piezoelectricity near the uniaxial stress induced tricritical point (TCP) in Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>–0.3PbTiO<sub>3</sub>. Depending on temperature, the transverse compression driven rhombohedral to orthorhombic transition may involve monoclinic and tetragonal states on the polarization rotation path. The TCP occurs on the stress-temperature variable plane when two lines of first-order transitions intersect one line of critical points (LCP). Though the current tricritical point and our previously reported critical end point in the pressure vs. electric field variable plane are of disparate nature, they share a common wedge-shaped feature on the free energy surface. Anisotropic free energy flattening brings about dielectric anomaly and preferential piezoelectric enhancement. Longitudinal piezoelectric constant in the orthorhombic and shear constant in the tetragonal state are remarkably strengthened. Piezoelectric cusps do not diverge on the LCP but exhibit weak divergence at the transition between metastable monoclinic and orthorhombic states.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130741"},"PeriodicalIF":2.3,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144270143","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

Cascaded phase-change metasurfaces for orbital angular momentum mode switching 用于轨道角动量模式切换的级联相变超表面

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-07 DOI: 10.1016/j.physleta.2025.130740

Qingji Zeng , Yujie Zhang , Zhihang Liu , Yuyou Yang , Jiafu Chen , Huapeng Ye , Gaiqing Zhao , Dianyuan Fan , Shuqing Chen

{"title":"Cascaded phase-change metasurfaces for orbital angular momentum mode switching","authors":"Qingji Zeng , Yujie Zhang , Zhihang Liu , Yuyou Yang , Jiafu Chen , Huapeng Ye , Gaiqing Zhao , Dianyuan Fan , Shuqing Chen","doi":"10.1016/j.physleta.2025.130740","DOIUrl":"10.1016/j.physleta.2025.130740","url":null,"abstract":"<div><div>Optical orbital angular momentum (OAM) mode switching is vital for advancing signal modulation and channel multiplexing. Herein, a controllable spiral phase modulation strategy using cascaded phase-change metasurfaces is presented. By constructing Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> (GST) meta-atom arrays via the Pancharatnam-Berry phase theory, the conjugate spiral phase gradients are imparted to orthogonal circular polarization components. Utilizing the high phase response contrast between GST’s amorphous and crystalline states, we achieve switchable spiral phase patterns, enabling controllable OAM mode switching at a sub-nanosecond timescale. The paired GST metasurfaces can continuously switch seven OAM modes (from −3 to +3) with purities exceeding 81.3 %. Consequently, we demonstrate high-fidelity OAM-encoded shift-keying modulation transmission of four gray images with a decoding accuracy above 99.82 %, and transmit 16-QAM signals in an eight-channel OAM mode multiplexing communication system with bit-error-rates near 1 × 10<sup>−5</sup>. Our findings offer a scalable and compact solution for OAM mode switching, advancing OAM-based optical communication systems and networks.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130740"},"PeriodicalIF":2.3,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253602","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

Effects of additive noise and variable coefficients on the exact solutions of the stochastic Kawahara equation 加性噪声和变系数对随机Kawahara方程精确解的影响

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130723

Maojie Cai, Changzhao Li, Chuanjian Wang, Jiamin Shi

{"title":"Effects of additive noise and variable coefficients on the exact solutions of the stochastic Kawahara equation","authors":"Maojie Cai, Changzhao Li, Chuanjian Wang, Jiamin Shi","doi":"10.1016/j.physleta.2025.130723","DOIUrl":"10.1016/j.physleta.2025.130723","url":null,"abstract":"<div><div>This paper investigates exact solutions and soliton dynamics in a stochastic Kawahara equation with variable coefficients and additive noise. Using Galilean transformation, the original system is transformed to a variable-coefficient equation coupled with a solvable stochastic ODEs. Exact solutions are derived via <span><math><mi>Painlev</mi><mover><mrow><mi>e</mi></mrow><mrow><mo>´</mo></mrow></mover></math></span> truncation expansion and validated through an improved Zabusky-Kruskal finite difference scheme. Quantitative analysis reveals that variable coefficients induce waveform deformation through amplitude-phase modulation, while noise governs soliton stability via amplitude-width interactions. Crucially, increasing wave numbers suppress soliton diffusion by amplifying amplitude without altering width, thereby slowing dissipation. The methodology uniquely couples deterministic integrability with stochastic dynamics, differing from conventional approaches. Results demonstrate synergistic effects of nonlinear dispersion, variable coefficients, and noise on soliton evolution, providing new insights for stochastic fifth-order dispersive systems.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130723"},"PeriodicalIF":2.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144241463","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

Local and nonlocal Andreev reflections in graphene-superconductor hybrid structures based on tilted Dirac cone systems 基于倾斜狄拉克锥体系的石墨烯-超导体杂化结构中的局域和非局域Andreev反射

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130725

Yun-Xia Wang, Yu-Xian Li

{"title":"Local and nonlocal Andreev reflections in graphene-superconductor hybrid structures based on tilted Dirac cone systems","authors":"Yun-Xia Wang, Yu-Xian Li","doi":"10.1016/j.physleta.2025.130725","DOIUrl":"10.1016/j.physleta.2025.130725","url":null,"abstract":"<div><div>We study the scattering processes, the local and nonlocal Andreev reflections in graphene-superconductor hybrid structures based on tilted Dirac cone systems. The Dirac theory of graphene was deformed, which is characterized by two parameters <span><math><mi>ζ</mi><mo>=</mo><mi>ζ</mi><mo>(</mo><mi>cos</mi><mo>⁡</mo><mi>θ</mi><mo>,</mo><mi>sin</mi><mo>⁡</mo><mi>θ</mi><mo>)</mo></math></span>. This tilt deformation breaks the chiral symmetry of the energy band, and the tilted energy band makes the reflections and transmissions of electrons and holes show distinctive characteristics. We show that even if the incident angle is 0, the nonzero <em>ζ</em> will make both local and nonlocal Andreev reflections to be nonzero when <span><math><mi>E</mi><mo>≫</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span> (<em>E</em> is the excitation energy, and <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span> is the Fermi energy). Furthermore, as <em>ζ</em> approaches 1, the reflected electrons and holes are always perpendicular to the interface, regardless of whether <span><math><mi>E</mi><mo>≫</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span> or <span><math><mi>E</mi><mo>≪</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>F</mi></mrow></msub></math></span>. This perpendicular reflection is another type of reflections besides the specular reflection and the retro reflection. The tilt dependence of the conductance curves can be used to extract information about the direction and magnitude of the tilt.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"553 ","pages":"Article 130725"},"PeriodicalIF":2.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144240574","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