Results in Physics最新文献_第4页

An analytical investigation of nonlinear time-fractional Schrödinger and coupled Schrödinger–KdV equations

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-04 DOI: 10.1016/j.rinp.2025.108137

Yogeshwari F. Patel , Mohammad Izadi

{"title":"An analytical investigation of nonlinear time-fractional Schrödinger and coupled Schrödinger–KdV equations","authors":"Yogeshwari F. Patel , Mohammad Izadi","doi":"10.1016/j.rinp.2025.108137","DOIUrl":"10.1016/j.rinp.2025.108137","url":null,"abstract":"<div><div>This study applies the Fractional Reduced Differential Transform Method (FRDTM) to solve two nonlinear fractional equations: the time-fractional Schrödinger equation (TFSE) and the coupled Schrödinger–KdV (Sch–KdV) equation, which are prominent in quantum mechanics, plasma physics, and wave propagation studies. These equations model various wave phenomena, including dust-acoustic waves, electromagnetic waves, and Langmuir waves, in plasma physics. Using the Liouville–Caputo fractional derivative, FRDTM effectively incorporates nonlocality and memory effects. The solutions are derived as rapidly convergent infinite series with terms that are straightforward to compute, ensuring both accuracy and efficiency. Numerical examples highlight the method’s ability to closely approximate exact solutions, with graphical and tabular comparisons illustrating the effect of the fractional order on solution behavior and validating the approach through computed absolute errors. Additionally, discussions on the modulation instability of the models reinforce the robustness of FRDTM as a powerful tool for solving complex nonlinear fractional systems.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"70 ","pages":"Article 108137"},"PeriodicalIF":4.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143351380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum mechanical insights into Edge-Dependent electronic properties of phosphorene nanoribbons

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108140

Mohammadamir Bazrafshan , Adeleh Vatankhahan , Farhad Khoeini , Omid Farzadian

{"title":"Quantum mechanical insights into Edge-Dependent electronic properties of phosphorene nanoribbons","authors":"Mohammadamir Bazrafshan , Adeleh Vatankhahan , Farhad Khoeini , Omid Farzadian","doi":"10.1016/j.rinp.2025.108140","DOIUrl":"10.1016/j.rinp.2025.108140","url":null,"abstract":"<div><div>Phosphorene, known for its anisotropic physical properties, exhibits a direct moderate electronic band gap, making it a candidate for electronic applications. This study investigates the electronic properties of phosphorene nanoribbons (PNRs) with different edge configurations using density functional theory (DFT). It addresses the role of sublattices in zigzag and armchair phosphorene nanoribbons, identifying six different edge configurations for zigzag and two for armchair edges. The density of states (DOS) at the valence band maximum (VBM) can be strongly different on the sublayers in some zigzag edge configurations, which can be useful in many applications such as sensing. Conversely, the conduction band minimum (CBM) shows low sensitivity to the edge configuration, indicating that electron transport can be less affected than hole transport. The electronic band gap of both armchair and zigzag nanoribbons decreases with increasing width, which also varies with edge type. Armchair nanoribbons undergo compressive strain, while zigzag nanoribbons experience tensile stress compared to the corresponding directions in phosphorene. These findings provide insight into the design of phosphorene-based nanodevices, including transistors, sensors, and flexible electronics.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108140"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143315417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Zintl germanides for thermoelectric applications: Insights from DFT and Boltzmann transport theory

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108119

Souraya Goumri-Said , Sikander Azam , Bakhtiar Ul Haq , Mohammed Benali Kanoun

{"title":"Zintl germanides for thermoelectric applications: Insights from DFT and Boltzmann transport theory","authors":"Souraya Goumri-Said , Sikander Azam , Bakhtiar Ul Haq , Mohammed Benali Kanoun","doi":"10.1016/j.rinp.2025.108119","DOIUrl":"10.1016/j.rinp.2025.108119","url":null,"abstract":"<div><div>We present a comprehensive theoretical investigation of the electronic and thermoelectric properties of Zintl germanides AeNiGe (Ae = Mg, Sr, Ba) using density functional theory (DFT) combined with Boltzmann transport theory. Our calculations reveal that all three compounds exhibit metallic behavior, with notable differences in their electronic band structures and density of states. Analysis of the partial density of states shows that the bands near the Fermi level are primarily composed of Ni-<em>d</em> and Ge-<em>p</em> states, with varying contributions from the alkaline earth metals’ orbitals. The thermoelectric properties, calculated using the BoltzTraP code within the relaxation time approximation, indicate a strong dependence on temperature and chemical potential. Ba- and Sr-based compounds demonstrate superior thermoelectric performance compared to Mg-based counterparts, achieving maximum Seebeck coefficients of approximately 40 µV/K at 450 K under negative chemical potentials (−2.00 eV). Additionally, Ba- and Sr-based materials exhibit significantly lower thermal conductivity (below 1 W/mK at high temperatures) compared to Mg-based materials (up to 7 W/mK). These findings suggest that BaNiGe and SrNiGe are promising candidates for thermoelectric applications, offering an optimal balance of high Seebeck coefficient, moderate electrical conductivity, and low thermal conductivity. Our results provide valuable insights for the design and ptimization of Zintl-based thermoelectric materials for energy conversion applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108119"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamically scattering medium-based security-enhanced optical image encryption using orbital angular momentum and deep learning

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2024.108100

Junbao Hu , Xutao Mo , Yu Lei , Xianshan Huang , Dong Wang

{"title":"Dynamically scattering medium-based security-enhanced optical image encryption using orbital angular momentum and deep learning","authors":"Junbao Hu , Xutao Mo , Yu Lei , Xianshan Huang , Dong Wang","doi":"10.1016/j.rinp.2024.108100","DOIUrl":"10.1016/j.rinp.2024.108100","url":null,"abstract":"<div><div>Scattering medium-based optical image encryption is a practical strategy for information security, but it is challenging to convert speckles caused by scattering into encrypted information. In addition, the security level of the encryption is an issue of concern. Here we propose and demonstrate a potential optical image encryption with high security, in particular using optical orbital angular momentums (OAMs) to carry plaintext information so that encrypted information can be coded and converted into speckles, besides a dynamic diffuser for encryption and a pre-trained convolutional neural network (CNN) model for decryption. The high level of security stems from the use of both <em>the order key</em> (one-to-one correspondence between the labelled OAMs and the speckles) and <em>the model key</em> (unduplicatable pre-trained CNN model). Proof-of-concept experiments to demonstrate the proposed method have been successfully carried out. The image encryption method can open up new prospects for authentication, anti-counterfeiting and encrypted communication.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108100"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain-engineering quantum anomalous hall state in janus MnBi2SexTe4−x monolayers

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108115

Jiale Chen , Pengfei Li , Jun Hu

引用次数: 0

Influence of entropy changes on first passage time in the thermodynamics of trajectories

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108128

V.V. Ryazanov

引用次数: 0

Investigation of Nd3+-doped oxide and oxy-fluorotellurite glasses for optical and radiation shielding applications

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108111

B. Karthikeyan , M. Venkateshprabhu , R. Praveena , Upendra Kumar Kagola , M.I. Sayyed , N. Manikandan

引用次数: 0

X-ray phase contrast imaging and diffraction in the laser-heated diamond anvil cell: A case study on the high-pressure melting of Pt

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108132

Emma Ehrenreich-Petersen , Bernhard Massani , Thea Engler , Olivia S. Pardo , Konstantin Glazyrin , Nico Giordano , Johannes Hagemann , Daniel Sneed , Timofey Fedotenko , Daniel J. Campbell , Mario Wendt , Sergej Wenz , Christian G. Schroer , Mathias Trabs , R.Stewart McWilliams , Hanns-Peter Liermann , Zsolt Jenei , Earl F. O’Bannon

{"title":"X-ray phase contrast imaging and diffraction in the laser-heated diamond anvil cell: A case study on the high-pressure melting of Pt","authors":"Emma Ehrenreich-Petersen , Bernhard Massani , Thea Engler , Olivia S. Pardo , Konstantin Glazyrin , Nico Giordano , Johannes Hagemann , Daniel Sneed , Timofey Fedotenko , Daniel J. Campbell , Mario Wendt , Sergej Wenz , Christian G. Schroer , Mathias Trabs , R.Stewart McWilliams , Hanns-Peter Liermann , Zsolt Jenei , Earl F. O’Bannon","doi":"10.1016/j.rinp.2025.108132","DOIUrl":"10.1016/j.rinp.2025.108132","url":null,"abstract":"<div><div>Melting temperatures of materials at high-pressure are one of the key physical properties that can be measured. However, large discrepancies in high-pressure melt lines exist between different experimental and theoretical approaches. In this paper, we present a novel approach for melting determination at high pressure where time-resolved synchrotron X-ray phase contrast imaging is used to observe the solid to liquid phase transition in laser heated samples in the diamond anvil cell along with simultaneous X-ray diffraction. Optical radiometric temperature measurements are correlated with the observed phase boundaries determined from X-ray phase contrast images and structural information from X-ray diffraction patterns to determine the melting temperature. We benchmarked this new technique with experiments on the high-pressure melting of platinum (Pt). Our new Pt melting results are compared with several recent studies on the high pressure melt line of Pt which utilized different techniques to determine melting. The technique can readily be applied to other materials and offers great potential for the determination of accurate and precise melting temperatures.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108132"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative investigation of dielectric, magnetic, and adsorption aspects of ZnO nanoparticles doped by Er or Nd

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108113

Mansour Mohamed , Abdullah F. Al–Naim , Abdullah Almohammedi , A. Sedky

{"title":"Comparative investigation of dielectric, magnetic, and adsorption aspects of ZnO nanoparticles doped by Er or Nd","authors":"Mansour Mohamed , Abdullah F. Al–Naim , Abdullah Almohammedi , A. Sedky","doi":"10.1016/j.rinp.2025.108113","DOIUrl":"10.1016/j.rinp.2025.108113","url":null,"abstract":"<div><div>Here, we compare the structural, dielectric, magnetic, and adsorption properties of two series of Zn<sub>1-x</sub>RE<sub>x</sub>O nanoparticles (NPs) with x ≤ 0.20 and RE = Er or Nd. The majority of structural metrics are raised against x up to 0.10 in all NPs samples; however, they are higher for the Nd samples. The opposite behavior is also true for the ac electrical conductivity and dielectric constant against x, although they are higher for the Er samples. The quality factor, impedance, and series resistance are significantly increased against x, whereas the equivalent capacitance was decreased, such that they are higher for the Nd samples. The ZnO NPs exhibited poor ferromagnetic behavior of saturated magnetization (M<sub>s</sub>) of 0.018 (emu/g). In contrast, the RE-doped ZnO NPs show ferromagnetic behavior such that the highest values of Ms (0.514 and 0.463 emu/g) obtained at x = 0.10 for Er and Nd. Furthermore, the RE ions shift the ZnO NPs from soft to hard magnetic materials along with high values of all magnetic parameters. Moreover, the ZnO NPs had the highest switching field distribution (SFD) of 60.95 Oe, whereas the incorporation of Er or Nd in the ZnO NPs induced a further reduction in SFD to 5.31 or 10.56 Oe. The 0.10 Er NPs show the highest values of surface area (SA) and dye removal (DR%) of 63.22 m<sup>2</sup>/g and 72.07 %, respectively, whereas the lowest values of 38.89 m<sup>2</sup>/g and 59.49 % were obtained for ZnO NPs, and meanwhile the 0.10 Nd NPs (51.95 m<sup>2</sup>/g and 63.77 %). This investigation paves the way for the original of RTFM in the RE-doped ZnO NPs and is a promising candidate for some of the more advanced devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108113"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulation of vortex ion generation from a cold atom ion source

IF 4.4 2区物理与天体物理

Results in Physics Pub Date : 2025-02-01 DOI: 10.1016/j.rinp.2025.108123

Xuan Liu , Wenchang Zhou , Qi Meng , Zhen Yang , Wei Ma , Liang Lu , Pengming Zhang , Liping Zou

{"title":"Simulation of vortex ion generation from a cold atom ion source","authors":"Xuan Liu , Wenchang Zhou , Qi Meng , Zhen Yang , Wei Ma , Liang Lu , Pengming Zhang , Liping Zou","doi":"10.1016/j.rinp.2025.108123","DOIUrl":"10.1016/j.rinp.2025.108123","url":null,"abstract":"<div><div>Vortex waves with orbital angular momentum (OAM) have garnered significant attention since their appearance due to their unique properties. Vortex beams are experimentally demonstrated with photons, electrons, neutrons, and atoms. However, it is still challenging to make ions with large masses produce vortex states. This study describes a scheme for generating vortex ion beams with a cold atom ion source (CAIS). In CAIS, ions are obtained by near-threshold photoionization rubidium atoms in magneto-optical trap (MOT). We investigate the propagation properties of the rubidium ion beams through simulations. In the simulation, rubidium ions extract from the CAIS and generate vortices by diffracting with holograms, where the phase of the wavefunction is changed. We analyze in detail the structure and voltage of the CAIS and propose a feasible scheme for generating vortex ions in laboratory experiments. Additionally, we propose two alternatives, one is to reduce the velocity of the ions lower, another is to use a magnetic needle to generate vortex ions. These proposals provide a new pathway for future explorations into the generation and properties of vortex ion beams.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"69 ","pages":"Article 108123"},"PeriodicalIF":4.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143149250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0