Physics Letters A最新文献_第10页

Trion and biexciton induced by spin-exciton-polariton 自旋激子极化子诱导的激子和双激子

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-17 DOI: 10.1016/j.physleta.2025.130904

Xuebing Gong , Xianghu Wang , Yue Wang , Dezhen Shen , Hai Zhu

引用次数: 0

Quantitative assessment of grain boundary effects on irradiation resistance in copper via atomistic simulations 通过原子模拟定量评价铜的晶界效应对辐照抗性的影响

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-15 DOI: 10.1016/j.physleta.2025.130900

Jun Huang , Tang Gu , Dengke Chen

引用次数: 0

Dynamic analysis of coupling continuous and fractal space nonlinear vibrations in duffing system duffing系统连续与分形空间耦合非线性振动的动力学分析

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-14 DOI: 10.1016/j.physleta.2025.130901

Guang-Qing Feng

{"title":"Dynamic analysis of coupling continuous and fractal space nonlinear vibrations in duffing system","authors":"Guang-Qing Feng","doi":"10.1016/j.physleta.2025.130901","DOIUrl":"10.1016/j.physleta.2025.130901","url":null,"abstract":"<div><div>The present study proposes a generalized Duffing oscillator framework, which unifies continuous and fractal spaces via a coupled dynamical model with classical and fractional-order derivatives. A dynamic coupling coefficient regulates energy distribution between inertial forces and fractal damping, thereby facilitating continuous transitions between classical, hybrid, and fractal regimes. Analytical methods, including two-scale fractal theory and frequency-amplitude analysis, as well as numerical schemes, have been employed to resolve multiscale dynamics. Key findings show fractal spatial irregularity induces power-law amplitude decay, contrasting classical exponential damping, while the coupling coefficient modulates frequency and energy partitioning. Numerical simulations reveal hybrid regimes balancing oscillations and fractal damping, crucial for adaptive composites, porous media, and biological tissues. The derived frequency-amplitude relationship offers an analytical tool for fractional systems, with critical damping thresholds providing design criteria. This work establishes a nexus between continuum mechanics and fractal geometry, thereby enhancing the comprehension of nonlinear vibrations in multiscale systems.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"558 ","pages":"Article 130901"},"PeriodicalIF":2.6,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144867370","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

Effect of arbitrarily directed electric field on hole spectra and absorption in a quantum dot with off-center impurity 任意方向电场对偏心杂质量子点空穴光谱和吸收的影响

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-14 DOI: 10.1016/j.physleta.2025.130898

R.Ya. Leshko , H.Ya. Bandura , I.V. Bilynskyi , A.V. Karpyn , M.V. Kvyk , Ya.Yu. Melnyk , A.O. Ocheretyanyi , M.Yu. Popov

{"title":"Effect of arbitrarily directed electric field on hole spectra and absorption in a quantum dot with off-center impurity","authors":"R.Ya. Leshko , H.Ya. Bandura , I.V. Bilynskyi , A.V. Karpyn , M.V. Kvyk , Ya.Yu. Melnyk , A.O. Ocheretyanyi , M.Yu. Popov","doi":"10.1016/j.physleta.2025.130898","DOIUrl":"10.1016/j.physleta.2025.130898","url":null,"abstract":"<div><div>In this work, calculations of the hole energy in a spherical quantum dot with an off-center acceptor impurity located along the z-axis were performed under the condition of an applied electric field rotated within the x–z plane. Owing to the axial symmetry of the system, this consideration is fully general, since any arbitrary 3D orientation of the electric field can be reduced to an equivalent configuration in the x–z plane by rotation around the z-axis. The computations were carried out within the multiband effective mass approximation (Luttinger–Kohn model in the spherical approximation of Baldereschi–Lipari), using rectangular potential well and barrier. The hole–acceptor interaction was modeled by the Coulomb potential, and the Schrödinger equation was solved via expansion over a complete function set. The optical absorption coefficient was calculated in the dipole approximation with QD size dispersion, revealing the effects of electric field orientation and size distribution on absorption spectra.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"559 ","pages":"Article 130898"},"PeriodicalIF":2.6,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893686","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

Statistical analysis on level energies and effective line strengths of singly ionized lanthanides for opacity of kilonovae 单电离镧系元素对千新星不透明的能级能和有效谱线强度的统计分析

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-14 DOI: 10.1016/j.physleta.2025.130884

Daiji Kato , Masaomi Tanaka , Gediminas Gaigalas , Laima Kitovienė , Pavel Rynkun

{"title":"Statistical analysis on level energies and effective line strengths of singly ionized lanthanides for opacity of kilonovae","authors":"Daiji Kato , Masaomi Tanaka , Gediminas Gaigalas , Laima Kitovienė , Pavel Rynkun","doi":"10.1016/j.physleta.2025.130884","DOIUrl":"10.1016/j.physleta.2025.130884","url":null,"abstract":"<div><div>Lanthanides play essential roles in opacities for the kilonova, the ultraviolet-optical-infrared emission from the neutron star merger detected by the gravitational wave (GW170817). In this paper, we examined suitable statistical representations for quasi-continuous spectra of singly ionized lanthanides (<span><math><mi>Z</mi><mo>=</mo><mn>59</mn><mo>−</mo><mn>70</mn></math></span>) based on our previous <em>ab-initio</em> calculations using the multi-configuration Dirac-Hartree-Fock and parametric potential methods. Using higher order <em>Gram-Charlier</em> expansions, an improved representation was obtained for the statistical distribution of the level energies. Systematic features that appear in <em>mean, variance</em>, and <em>skewness</em> of the distribution are explained in terms of atomic structure theories. We found that the effective line strength, that is defined as a product of the line strength and the Boltzmann factor at a give temperature, follows the log-logistic distribution. The scaling parameter of the log-logistic distribution gives an indicator down to which transitions should be included in opacity calculations for neutron star mergers.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"558 ","pages":"Article 130884"},"PeriodicalIF":2.6,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829835","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

The Bethe lattice with ferromagnetic and antiferromagnetic interactions in an external magnetic field: Two atoms per site 在外磁场中具有铁磁和反铁磁相互作用的贝特晶格：每个位置有两个原子

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-13 DOI: 10.1016/j.physleta.2025.130894

Erhan Albayrak

引用次数: 0

Coherent states in classical field theory 经典场论中的相干态

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-13 DOI: 10.1016/j.physleta.2025.130893

Abhijeet Joshi , Vivek M. Vyas , Prasanta K. Panigrahi

引用次数: 0

Spin-valley selective crossed Andreev reflection in noncollinear graphene 非共线石墨烯中自旋谷选择性交叉Andreev反射

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-13 DOI: 10.1016/j.physleta.2025.130887

Weiwei Yan , R. Shen

{"title":"Spin-valley selective crossed Andreev reflection in noncollinear graphene","authors":"Weiwei Yan , R. Shen","doi":"10.1016/j.physleta.2025.130887","DOIUrl":"10.1016/j.physleta.2025.130887","url":null,"abstract":"<div><div>We theoretically investigate the nonlocal transport properties of the graphene-based antiferromagnet/ferromagnet/<em>s</em>-wave superconductor/antiferromagnet junction. Introducing a mass term or enhancing the intrinsic spin-orbit coupling in the antiferromagnetic region enables the formation of spin-polarized or valley-polarized band structures. The valley-polarized band structure suppresses the crossed Andreev reflection for <span><math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>↑</mo></math></span> incident electrons, resulting in this process being entirely contributed by <em>K</em>↑ incoming electrons. Due to the spin-flip effect, the crossed Andreev reflection holes can come from both <span><math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>↑</mo></math></span> and <span><math><msup><mrow><mi>K</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>↓</mo></math></span> valence bands, corresponding to the equal-spin and opposite-spin crossed Andreev reflection (EACR and OCAR), respectively. By tuning the ferromagnetic exchange field, the spin polarization direction of the crossed Andreev reflection channel can be further selected, thereby enabling the crossed Andreev reflection with a specific spin-valley index without interference from other scattering processes. Furthermore, ECAR and OCAR exhibit magnetoanisotropic behavior for the out-of-plane magnetization, while remaining magnetoisotropic for the in-plane magnetization.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"558 ","pages":"Article 130887"},"PeriodicalIF":2.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144829829","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

Quantum transport across modular cells on the Bethe lattice 贝特晶格上模胞间的量子传输

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-13 DOI: 10.1016/j.physleta.2025.130890

Ning Bai , Qi Han

引用次数: 0

Magnetic phase diagram of hole-doped cuprates: A derivation from fundamental length scales 空穴掺杂铜酸盐的磁相图：从基本长度尺度的推导

IF 2.6 3区物理与天体物理

Physics Letters A Pub Date : 2025-08-13 DOI: 10.1016/j.physleta.2025.130892

Orifjon Ganiev

{"title":"Magnetic phase diagram of hole-doped cuprates: A derivation from fundamental length scales","authors":"Orifjon Ganiev","doi":"10.1016/j.physleta.2025.130892","DOIUrl":"10.1016/j.physleta.2025.130892","url":null,"abstract":"<div><div>We propose a two-scale polaronic model for the magnetic phase diagram of hole-doped cuprates. The model distinguishes the high-energy formation of polaronic pairs, defining the pseudogap energy <span><math><msub><mrow><mi>Δ</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span> and a small pair size <span><math><msup><mrow><mi>ξ</mi></mrow><mrow><mo>⁎</mo></mrow></msup></math></span>, from their low-energy phase coherence, which sets the superconducting transition and a larger coherence length <span><math><msub><mrow><mi>ξ</mi></mrow><mrow><mi>s</mi><mi>c</mi></mrow></msub></math></span>. We show that the competition between these two length scales governs the entire magnetic field-doping (<span><math><mi>H</mi><mo>−</mo><mi>p</mi></math></span>) phase diagram. This framework quantitatively reproduces the characteristic dome of the upper critical field, <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>c</mi><mn>2</mn></mrow></msub><mo>(</mo><mi>p</mi><mo>)</mo></math></span>, as a direct consequence of doping-dependent phase coherence. Furthermore, the pseudogap quantum critical point is identified as the doping where Coulomb repulsion unbinds the pairs. Our theoretical predictions for <span><math><msub><mrow><mi>H</mi></mrow><mrow><mi>c</mi><mn>2</mn></mrow></msub><mo>(</mo><mi>p</mi><mo>)</mo></math></span> and <span><math><msub><mrow><mi>ξ</mi></mrow><mrow><mi>s</mi><mi>c</mi></mrow></msub><mo>(</mo><mi>p</mi><mo>)</mo></math></span> are in excellent quantitative agreement with experimental data for La<span><math><msub><mrow></mrow><mrow><mn>2</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Sr<sub><em>x</em></sub>CuO<sub>4</sub>.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"558 ","pages":"Article 130892"},"PeriodicalIF":2.6,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144860633","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