Physics Letters A最新文献

On an extended semi-discrete matrix coupled dispersionless system: Darboux transformation and explicit solutions 关于扩展的半离散矩阵耦合无分散系统：达尔布变换与显式解

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-15 DOI: 10.1016/j.physleta.2024.130060

H.W.A. Riaz , J. Lin , J. Wang

引用次数: 0

DASH: A novel method for dynamically selecting key nodes to spread information rapidly under the graph burning model DASH：图焚烧模型下动态选择关键节点以快速传播信息的新方法

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-14 DOI: 10.1016/j.physleta.2024.130058

Qinghan Xue, Jiaqi Song, Xingqin Qi

引用次数: 0

High thermal energy storage of the two-dimensional Al2Te3 semiconductor: DFT study of stability, electronic, phonon, thermal, and optical properties based on GGA and HSE06 二维 Al2Te3 半导体的高热能储存：基于 GGA 和 HSE06 的稳定性、电子、声子、热和光学特性的 DFT 研究

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-13 DOI: 10.1016/j.physleta.2024.130052

Nzar Rauf Abdullah , Yousif Hussein Azeez , Bashdar Rahman Pirot , Vidar Gudmundsson

{"title":"High thermal energy storage of the two-dimensional Al2Te3 semiconductor: DFT study of stability, electronic, phonon, thermal, and optical properties based on GGA and HSE06","authors":"Nzar Rauf Abdullah , Yousif Hussein Azeez , Bashdar Rahman Pirot , Vidar Gudmundsson","doi":"10.1016/j.physleta.2024.130052","DOIUrl":"10.1016/j.physleta.2024.130052","url":null,"abstract":"<div><div>The present study investigates the structural, electronic, thermal, and optical properties of a novel two-dimensional Al<sub>2</sub>Te<sub>3</sub> using GGA and HSE06 functional in the framework of density functional theory. The formation energy, the phonon dispersion, and AIMD calculations confirm the structural, dynamical, and thermal stability of Al<sub>2</sub>Te<sub>3</sub>, respectively. The electronic band structure and partial density of states indicate the semiconducting characteristics of 2D Al<sub>2</sub>Te<sub>3</sub> with band gap values of 1.92 eV (GGA) and 2.78 eV (HSE06). The thermal properties of Al<sub>2</sub>Te<sub>3</sub> reveal a high heat capacity due to a very high phonon density of states. This property signifies the material's growing ability to store thermal energy. Thus the entropy demonstrates a continuous increase with temperature, adhering to the second law of thermodynamics. The analysis of optical properties of Al<sub>2</sub>Te<sub>3</sub> demonstrates strong light interaction in the ultraviolet, UV, region, and the optical band gap is found to be larger than the electronic band gap for both GGA and HSE06 functional due to indirect behavior of the band gap. Furthermore, the static dielectric function, refractive index, and optical conductivity are found to be smaller in the case of HSE06 compared to the GGA which may be due to reduced transition probability, and less screening effects including in the HSE06 functional. These findings offer valuable insights into the potential applications of Al<sub>2</sub>Te<sub>3</sub> in various fields, including thermal energy storage and optoelectronics.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"528 ","pages":"Article 130052"},"PeriodicalIF":2.3,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651076","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

Tunable electronic structure and enhanced optical properties of blue phosphorene via adsorption of alkali metal atoms 通过吸附碱金属原子调控蓝色磷烯的电子结构并增强其光学特性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-12 DOI: 10.1016/j.physleta.2024.130055

Si-Si Wu , Qian Liu , Dan Wu , Gui-Ping Tang , Zhi-Qiang Fan , Fang Xie

引用次数: 0

Emergency evacuation dynamics based on evolutionary game theory 基于进化博弈论的紧急疏散动力学

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-12 DOI: 10.1016/j.physleta.2024.130059

Kun Li , Zhiyu Chen

引用次数: 0

Dependence of the ultrasound-caused shifts in optical frequency and phase and the modulation of optical phase in acousto-optic interaction of turbid media 浑浊介质声光相互作用中超声波引起的光学频率和相位偏移以及光学相位调制的相关性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-10 DOI: 10.1016/j.physleta.2024.130056

Cuncheng Weng

引用次数: 0

Interacting Floquet topological magnons in laser-irradiated Heisenberg honeycomb ferromagnets 激光辐照海森堡蜂窝铁磁体中相互作用的 Floquet 拓扑磁子

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-10 DOI: 10.1016/j.physleta.2024.130054

Hongchao Shi, Heng Zhu, Bing Tang, Chao Yang

{"title":"Interacting Floquet topological magnons in laser-irradiated Heisenberg honeycomb ferromagnets","authors":"Hongchao Shi, Heng Zhu, Bing Tang, Chao Yang","doi":"10.1016/j.physleta.2024.130054","DOIUrl":"10.1016/j.physleta.2024.130054","url":null,"abstract":"<div><div>Upon irradiation with high-frequency circularly polarized light, the Heisenberg spin system on a honeycomb lattice develops a next-nearest neighbor Dzyaloshinskii-Moriya interaction (DMI) term, transforming it into a magnonic Floquet topological insulator with intriguing physical properties. In this context, we investigate the many-body interaction effects of Floquet magnons in a laser-irradiated Heisenberg honeycomb ferromagnet featuring DMI under circularly polarized off-resonant light illumination. Our analysis employs the magnon Floquet-Bloch theory and Green's function method. We demonstrate that quantum ferromagnet systems driven periodically by lasers exhibit temperature-driven topological phase transitions due to Floquet magnon-magnon interactions, transitions that are absent when such interactions are neglected. Furthermore, we observe that the critical temperature necessary for reversing the sign of the topological phase gradually increases with elevated light intensity. This study introduces a novel approach to constructing Floquet topological phases in periodically driven quantum magnet systems.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"528 ","pages":"Article 130054"},"PeriodicalIF":2.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651203","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

Optoelectronic and transport properties of layer-dependent two-dimensional perovskite Cs3Bi2I9 层依赖性二维包晶 Cs3Bi2I9 的光电和传输特性

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-10 DOI: 10.1016/j.physleta.2024.130053

Yu-Xuan Li , Jun Zhong , Xiang-Jie Xiong , Yong-Qi Ning , Ying Xu , Hui-Ping Zhu , Yu-Qing Zhao , Bo Li

{"title":"Optoelectronic and transport properties of layer-dependent two-dimensional perovskite Cs3Bi2I9","authors":"Yu-Xuan Li , Jun Zhong , Xiang-Jie Xiong , Yong-Qi Ning , Ying Xu , Hui-Ping Zhu , Yu-Qing Zhao , Bo Li","doi":"10.1016/j.physleta.2024.130053","DOIUrl":"10.1016/j.physleta.2024.130053","url":null,"abstract":"<div><div>The emergence of two-dimensional (2D) perovskite provides an ideal platform for designing and fabricating microelectronic and optoelectronic devices. Here, we present detailed ab initio calculations to comprehensively explore the layer-dependent optoelectronic and transport properties of the newly synthesized 2D perovskite Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>. The calculations reveal that the indirect band gap of monolayer, bilayer, and trilayer Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub> decreases from 2.41 to 2.35 eV The charge carriers of few-layered perovskite Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub> are dominated by electrons, and the highest electron and hole carrier mobilities are 140 and 62 cm²V⁻¹s⁻¹ along the b axis for bilayer Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub>. Exciton binding energies decrease from 2.48 to 1.19 eV with an increment of layer, and the calculated exciton level drops down into the valence band to generate potential exciton insulator. 2D Cs<sub>3</sub>Bi<sub>2</sub>I<sub>9</sub> exhibits potential in the field of ultraviolet detection and photoluminescent devices due to large exciton energy and ultraviolet absorption.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"528 ","pages":"Article 130053"},"PeriodicalIF":2.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651202","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

Triple ultraviolet to visible perfect absorptions of lifted metamaterial for highly sensitive sensing and slow light 用于高灵敏传感和慢速光的三重紫外线到可见光完美吸收提升超材料

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-10 DOI: 10.1016/j.physleta.2024.130057

Lili Yu , Jingsheng Jia , Ping Gu , Jing Chen , Chaojun Tang , Zhendong Yan

{"title":"Triple ultraviolet to visible perfect absorptions of lifted metamaterial for highly sensitive sensing and slow light","authors":"Lili Yu , Jingsheng Jia , Ping Gu , Jing Chen , Chaojun Tang , Zhendong Yan","doi":"10.1016/j.physleta.2024.130057","DOIUrl":"10.1016/j.physleta.2024.130057","url":null,"abstract":"<div><div>Achieving multiple perfect absorptions from ultraviolet (UV) to near-infrared (IR) region is practically important for metamaterial-based efficient harvesting of photons and biosensor. Here, we theoretically demonstrate a triple narrow and broad perfect absorptions (PAs) from visible to UV range in a lifted metamaterial made of aluminum vertical split-ring resonators (Al VSRR) on silica nanostrip /Al mirror. The three simultaneously achieved narrowband and broadband PAs with bandwidth of 283.3 nm, 8.9 nm and 18.2 nm are excited from magnetic plasmon resonance, surface plasmons polariton and plasmon standing wave mode, respectively, which is further explained by the impedance matching theory. The triple-band absorption peaks are further tailored by changing the size of the structure. The group index of the lifted Al VSRR array can reach as large as 2.5 × 10<sup>3</sup> in the UV range. Moreover, due to the designed metamaterial being lifted with the reduced substrate effect, the figure of merit (<em>FoM</em>*) and sensitivity (<em>S</em>) in the UV range are as high as 1.1 × 10<sup>6</sup> and 306 nm per refractive index unit‌ (306 nm/RIU), respectively. The proposed lifted metamaterial could have a considerable effect on the development of various UV plasmonic applications, including slow light nanodevices and optical sensor.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"528 ","pages":"Article 130057"},"PeriodicalIF":2.3,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651074","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

Kernel mean embedding vs kernel density estimation: A quantum perspective 核均值嵌入与核密度估计：量子视角

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2024-11-09 DOI: 10.1016/j.physleta.2024.130047

Yann Berquin

引用次数: 0