The European Physical Journal Plus最新文献_第10页

Wave–wave interaction of an extended evolution equation with complete Coriolis parameters 具有完全科里奥利参数的扩展演化方程的波-波相互作用

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-13 DOI: 10.1140/epjp/s13360-023-04288-4

Na Cao, XiaoJun Yin, LiYang Xu, ShuTing Bai

引用次数: 1

First-principles insights into the optical and electronic characteristics of barium intercalated AB-stacked bilayer graphene 基于第一性原理的钡嵌入ab -堆叠双层石墨烯的光学和电子特性研究

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-11 DOI: 10.1140/epjp/s13360-023-04265-x

A. Chafai, I. Bouziani, S. Bouhou, I. Essaoudi, R. Ahuja, C. A. Duque, A. Ainane

{"title":"First-principles insights into the optical and electronic characteristics of barium intercalated AB-stacked bilayer graphene","authors":"A. Chafai, I. Bouziani, S. Bouhou, I. Essaoudi, R. Ahuja, C. A. Duque, A. Ainane","doi":"10.1140/epjp/s13360-023-04265-x","DOIUrl":"10.1140/epjp/s13360-023-04265-x","url":null,"abstract":"<div><p>The present study describes the electronic and optical characteristics of barium atoms (an alkaline earth metal) intercalated within AB-stacked bilayer graphene (AB-2LG). Using state-of-the-art first-principles computations and taking into account the dispersion forces between the diverse nanosheets, we determined that the intercalation of barium atoms (Ba) into AB-2LG increases the interlayer distance from 3.357 to 5.584? <span>({mathring{A}})</span>, and no C–Ba bond formation has been observed. In addition, our findings reveal that the presence of Ba atoms inside the AB-2LG induces a change in the Space group number from 164 (pure AB-2LG) to 156 (Ba-intercalated AB-2LG). Concurrently, we observed that the AB-2LG band structure exhibits a Dirac cone at the K-point, which is a characteristic signature of a semi-metallic character. By contrast, the electronic behavior of the barium-intercaled AB-2LG is found to be metallic. Also, we noticed that the confinement of Ba atoms into the AB-2LG shifts the Dirac point under the Fermi level. Additionally, upon examining the optical properties under the 001 and 100-polarization of the incident light, we found that all optical parameters of both under-investigated bidimensional materials exhibit an anisotropic character. Interestingly, under the 001-polarization, we observed that the intercalation of AB-2LG with Ba atoms reduces the optical absorption to zero in the visible region, and blueshifts are the absorption peak observed in the infrared region. Furthermore, in the case of 001-polarization, the presence of Ba atoms enhances the optical absorption in the 7–9?eV spectral range. However, the obtained data exhibit a remarkable decrease in the refractive index after the Ba intercalation process, for both considered polarization directions.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"138 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-023-04265-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4444577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Analytical study of low energy proton interactions in the SORGENTINA’s fusion ion source-part I: beam-dump SORGENTINA聚变源中低能质子相互作用的分析研究——第一部分:束流转储

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-11 DOI: 10.1140/epjp/s13360-023-04306-5

A. Pietropaolo, A. Del Dotto, G. M. Contessa, the SRF-Collaboration

引用次数: 0

Effect of scalar field on dynamical evolution of thin-shell with hairy Schwarzschild black hole 标量场对带毛状史瓦西黑洞薄壳动力学演化的影响

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-11 DOI: 10.1140/epjp/s13360-023-04316-3

Faisal Javed, G. Mustafa, Ali Övgün

引用次数: 3

Correction to: New experimental confirmation of Kelvin’s equilibria 修正:开尔文平衡的新实验证实

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-11 DOI: 10.1140/epjp/s13360-023-04317-2

Hamid Ait Abderrahmane, Mohamed Fayed, Hoi Dick Ng, Georgios H. Vatistas

引用次数: 0

Dynamical wormhole solutions in Rastall theory Rastall理论中的动态虫洞解

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-10 DOI: 10.1140/epjp/s13360-023-04323-4

Yaghoub Heydarzade, Maryam Ranjbar

引用次数: 1

Half-metallicity, magnetic and optical attributes of mechanically stable half-Heusler VSnX (X = Pt, Pd) alloys for spintronics: a DFT study 自旋电子学用机械稳定半heusler VSnX (X = Pt, Pd)合金的半金属丰度、磁性和光学性质:DFT研究

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-10 DOI: 10.1140/epjp/s13360-023-04315-4

Faiza Firdous, Qurat ul Ain, Saif M. H. Qaid, Masood Yousaf, Hamid M. Ghaithan, Abdullah Ahmed Ali Ahmed, Junaid Munir

{"title":"Half-metallicity, magnetic and optical attributes of mechanically stable half-Heusler VSnX (X = Pt, Pd) alloys for spintronics: a DFT study","authors":"Faiza Firdous, Qurat ul Ain, Saif M. H. Qaid, Masood Yousaf, Hamid M. Ghaithan, Abdullah Ahmed Ali Ahmed, Junaid Munir","doi":"10.1140/epjp/s13360-023-04315-4","DOIUrl":"10.1140/epjp/s13360-023-04315-4","url":null,"abstract":"<div><p>Recent developments in spintronics reveal the significance of half-Heusler alloys due to their high spin polarization. Using Wien2k package, half-Heusler VSnX (X?=?Pt, Pd) alloys have been investigated. The structures are predicted to have most stable in magnetic phases. Furthermore, formation energies and mechanical parameters justify the stability conditions. The bonding nature is determined through Pugh ratio, while the brittle behavior is achieved through Poisson ratio. A half metallic character with indirect band gap (Spin-dn) is achieved for VSnPt and VSnPd alloys. The spin polarization in both alloys is demonstrated through DOS and integer values of magnetic moments. The optical attributes are evaluated through several optical parameters showing absorption in visible and UV regions. The half-metallic response and the optical characteristics reveal that VSnX (X?=?Pt, Pd) exhibit interesting features for spintronic and optoelectronic technologies.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"138 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4414074","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: 1

Optical vortices in brief: introduction for experimentalists 光学涡旋简介:实验工作者简介

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-10 DOI: 10.1140/epjp/s13360-023-04227-3

Lyubomir Stoyanov, Suzana Topuzoski, Gerhard G. Paulus, Alexander Dreischuh

{"title":"Optical vortices in brief: introduction for experimentalists","authors":"Lyubomir Stoyanov, Suzana Topuzoski, Gerhard G. Paulus, Alexander Dreischuh","doi":"10.1140/epjp/s13360-023-04227-3","DOIUrl":"10.1140/epjp/s13360-023-04227-3","url":null,"abstract":"<div><p>In this review, starting with the essence of phase singularities (Sect.?1) and continuing with the methods for the generation of singular beams of different kind (Sect.?2), we concentrate on optical vortices (OVs), which are the only known purely two-dimensional dark beams carrying point phase singularities. We describe some methods to determine their topological charges (Sect.?3) and how to convert them, e.g., in the linear process of diffraction from a hologram with an encoded OV, as well as after nonlinear processes of cascaded four-wave mixing and of the non-perturbative process of high harmonic generation (Sect.?5). In Sect.?6, we describe a method based on singular optics for the generation of long-range Bessel-Gaussian beams. Particular attention is paid to the suppression of the interaction of pairs of OVs and to the generation of large arrays of hundreds of OVs on a common background beam in square-shaped and hexagonal OV lattices (Sect.?7). The rich possibilities for the controllable generation of ordered focal structures of bright peaks and the possible additional structuring of each peak with other singular beams are illustrated, as well as the mixing of such OV arrays. New experimental results, devoted to novel possibilities for generating rich structures composed by bright peaks in the artificial far field from OV lattices with high TCs, are also presented for the first time in this paper and discussed in detail in (Sect.?8). In the last section, we describe a new method for the generation of arrays of long-range Bessel–Gaussian beams (Sects.?9). Without any claim for completeness or comprehensiveness, we believe that this overview will present to reader at least some of the beauty of experimental singular optics in space and could serve as a valuable initial step in order to dig deeper into the field.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"138 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-023-04227-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4411149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

A baseline estimation procedure to improve MDA evaluation in gamma-ray spectrometry 提高伽玛射线能谱中MDA评价的基线估计程序

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-10 DOI: 10.1140/epjp/s13360-023-04308-3

Elio Tomarchio, Mariarosa Giardina, Pietro Buffa

{"title":"A baseline estimation procedure to improve MDA evaluation in gamma-ray spectrometry","authors":"Elio Tomarchio, Mariarosa Giardina, Pietro Buffa","doi":"10.1140/epjp/s13360-023-04308-3","DOIUrl":"10.1140/epjp/s13360-023-04308-3","url":null,"abstract":"<div><p>The evaluation of minimum detectable activity (MDA) for a radionuclide in a gamma-ray spectrum is generally carried out through the computation of a suitable background count. This task is sometimes difficult for complex spectra for the presence of many photopeaks which make the trend of continuum extremely variable due to multiple dispersion effects and interference factors. It follows that the MDA assessment must be take into account the contributions of all gamma emissions of radionuclides contained in a sample and its value can be significantly higher than that determined by considering only the background of the spectrometric system due to the overlapping of other peaks. A procedure or an algorithm to determine, each time, the count values to be used for the calculation of MDA is interesting and useful. In this work, some of the more recent algorithms proposed for background subtraction in a gamma-ray spectrum have been examined, applying them in an inverse way for the evaluation of baseline trend in the whole energy range. Among the algorithms examined, particular attention was paid to the application of SNIP (statistical sensitive nonlinear iterative peak clipping) algorithms, which are the simplest to adopt and implement in an application procedure. The results obtained in the analysis of test gamma-ray spectra are satisfactory and allow to quickly determine the MDA values with a formulation based on the ISO-11929 standard.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"138 8","pages":""},"PeriodicalIF":3.4,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-023-04308-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4414073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Majorana bound states in a driven quantum dot 驱动量子点中的马约拉纳束缚态

IF 3.4 3区物理与天体物理

The European Physical Journal Plus Pub Date : 2023-08-10 DOI: 10.1140/epjp/s13360-023-04326-1

Fabián Medina-Cuy, Dunkan Martínez, Francisco Domínguez-Adame, P. A. Orellana

引用次数: 1