Results in Physics最新文献

{"title":"NEXAFS spectral peculiarities in Sn:SiO2 composite layer","authors":"Vladimir Sivakov ,&nbsp;Poting Liu ,&nbsp;Katharina Freiberg ,&nbsp;Shivani Yadav ,&nbsp;David C. Grinter ,&nbsp;Anna Makarova","doi":"10.1016/j.rinp.2025.108339","DOIUrl":"10.1016/j.rinp.2025.108339","url":null,"abstract":"<div><div>Synchrotron-based near-edge X-ray absorption fine structure (NEXAFS) spectroscopy has been used to investigate a novel Sn:SiO₂ composite thin layer grown by organometallic chemical vapor deposition technique (CVD) on a single crystalline silicon wafer with additional treatment by argon ions. According to a previously reported thermodynamic anomaly, an efficient exchange of oxygen between the silicon and tin dioxide surfaces occurs during the growth of the metal oxide thin layer. The present study focuses on the visualization of the atomic and electronic structure of tin nanostructures localized in silica matrix. It is found that no significant chemical alterations are observed during argon ions treatment of the initial composite layer. The removal of atmospheric residues, which partially passivated defects in the highly defective SnO_2-x top layer, did not significantly change the initial NEXAFS Sn M_4,5 edge spectrum. Based on these results, we found that the main state in which tin nanoparticles localized in the amorphous silica matrix is the metallic state. In addition, based on the NEXAFS Si L_2,3-edge studies, we found that silica is most associated with the stoichiometric structure of thermally deposited SiO₂ layer with the presence of silicon suboxides. These results provide insights into the atomic and electronic structure of Sn:SiO₂ composites and contribute to the possible implementation of such materials in various application concepts related to thermal energy storage and novel photonic devices.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108339"},"PeriodicalIF":4.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Laser radiation detection of the fluctuation alpha particle tracks in PADC","authors":"R.B. Alkhayat ,&nbsp;Ammar T. Zakar ,&nbsp;Mushtaq Abed Al-Jubbori ,&nbsp;Hana Ihsan Hasan","doi":"10.1016/j.rinp.2025.108342","DOIUrl":"10.1016/j.rinp.2025.108342","url":null,"abstract":"<div><div>The influence of different laser energy densities on PADC polymer is reported in this paper. The essential goal is to determine the variations in alpha particle track depths at different energy fluences of laser radiation in PADC detector. The maximal track depths of alpha particles can be unveiled in less etching time as the laser fluence increases. The maximum depth values of alpha tracks were 10.80 ± 0.16 µm, 10.70 ± 0.15 µm, 10.70 ± 0.15 µm, and 10.40 ± 0.14 µm, while saturation etching times were 2.75 ± 0.04, 3.00 ± 0.04, 3.25 ± 0.05, and 3.50 ± 0.05 h, corresponding to laser fluences of 21, 14, 7, and 0 J/cm². The V_b values are increasing with increased laser fluences. Samples exposed to laser radiation have a larger V_t value than unexposed counterparts, with higher increases recorded at higher laser fluences. Likewise, the laser irradiated samples showed a higher V value. The enhancement of the track growth on PADC is shown to be fluence dependent. The UV–Vis measurements revealed a higher absorbance spectrum for laser exposed samples. The optical band gap energy of PADC polymer is also decreased with increasing laser fluence. The free radical increases as the irradiation laser fluence increases, which causes a decrease in band gap energy in the PADC detector. The chemical alterations were also investigated based on Fourier Transform Infrared spectroscopy (FTIR). The net absorbance of some wavelengths of infrared spectra decreases slightly as laser fluence increases, correlated to the taking place of the scission process. However, an increase in absorbance is reported at specific wavelengths, indicating the production of OH groups during the photodegradation process.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108342"},"PeriodicalIF":4.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Characterization of charge state distributions in Near-Infrared Laser-Driven tin plasmas for efficient EUV generation","authors":"Jang Hyeob Sohn ,&nbsp;Hyun-Kyung Chung ,&nbsp;Hyungyu Yu ,&nbsp;Inki Jeong ,&nbsp;Sang June Hahn ,&nbsp;Young-Gui Yoon ,&nbsp;Hyyong Suk ,&nbsp;Byoung Ick Cho","doi":"10.1016/j.rinp.2025.108340","DOIUrl":"10.1016/j.rinp.2025.108340","url":null,"abstract":"<div><div>In this paper, the charge state distributions of extreme ultraviolet (EUV) light source plasmas produced by near-infrared-wavelength lasers are systematically characterized. The spatiotemporal properties of laser-irradiated planar tin targets are examined using radiation-hydrodynamic simulations and non-local thermodynamic equilibrium calculations. Focusing on the distributions of Sn¹¹⁺–Sn¹⁴⁺ ions, which are primarily responsible for “in-band” EUV emissions, a mean charge state of 12.5 is identified as the optimal ionization level for efficient EUV generation. This prediction is consistent with the experimental observation by Behnke <em>et al.</em> (2021) of short-wavelength spectra in the 7–10 nm range, where the contributions of the Sn¹¹⁺–Sn¹⁴⁺ ions are well identified. Simulations further reveal that spatially and temporally uniform pulses more efficiently achieve the optimal mean charge state, producing up to 45 % more Sn¹¹⁺–Sn¹⁴⁺ ions than Gaussian pulses of the same energy. These findings provide foundational insights for advancing laser-driven EUV light sources for industrial applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108340"},"PeriodicalIF":4.4,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"The (temperature-dependent) Raman spectra of some traditional semiconductors","authors":"A.R. Zanatta","doi":"10.1016/j.rinp.2025.108341","DOIUrl":"10.1016/j.rinp.2025.108341","url":null,"abstract":"<div><div>Semiconductor materials represent the core of many modern technological applications and they are expected to continue influencing the ever-growing field of data generation-transmission-processing. This can be reached by means of new materials and/or devices but, especially, by precisely recognizing (and controlling) some of their main properties. In this regard, Raman scattering spectroscopy can contribute with important structural-electronic information by probing the phonon behavior − even in well-known semiconductors − over a wide temperature range. Accordingly, this work presents a comprehensive investigation of the Raman spectra of 15 semiconductors (Si, Ge, SiC, GaN, GaP, GaAs, GaSb, InP, InAs, ZnO, ZnS, ZnSe, ZnTe, CdS, and TiO₂) comprising IV-IV, III-V and II-VI compounds and different crystal structures (diamond, zinc blende, wurtzite, and rutile). Based on these spectra, all phonon modes were identified and the most prominent ones were analyzed in terms of their peak position (<span><math><mi>ω</mi></math></span>) and line-width (<span><math><mi>γ</mi></math></span>), in the 83−823 K temperature range, as obtained from fitting the spectra with Voigt functions. This part of the work includes a detailed study of the temperature-dependent <span><math><mrow><mi>ω</mi><mfenced><mrow><mi>T</mi></mrow></mfenced></mrow></math></span> and <span><math><mrow><mi>γ</mi><mfenced><mrow><mi>T</mi></mrow></mfenced></mrow></math></span> data according to the 3- and 4-phonon model, as well as their (supposedly) linear behavior above room-temperature. In the former case it was possible (at least qualitatively) to separate the contributions due to the anharmonic phonon–phonon interactions from the thermal expansion effects. In the latter, the results suggest an apparent relationship between the linear <span><math><mrow><mi>d</mi><mi>ω</mi><mo>/</mo><mi>d</mi><mi>T</mi></mrow></math></span> and <span><math><mrow><mi>d</mi><mi>γ</mi><mo>/</mo><mi>d</mi><mi>T</mi></mrow></math></span> slopes and the optical bandgaps <span><math><msub><mi>E</mi><mrow><mi>gap</mi></mrow></msub></math></span>’s (and their corresponding linear <span><math><mrow><mi>d</mi><msub><mi>E</mi><mrow><mi>gap</mi></mrow></msub><mo>/</mo><mi>d</mi><mi>T</mi></mrow></math></span> slopes) of the various semiconductor samples − regardless of the compound type or crystal structure. The most likely origins of these relationships are discussed, and their potential in proposing the most suitable materials and/or operation conditions for device applications (as temperature probes or tunable optical filters, for instance) are briefly outlined.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108341"},"PeriodicalIF":4.4,"publicationDate":"2025-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144517122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"High-performance all-optical photonic crystal synapse based on Mach-Zehnder interferometer and directional coupler utilizing GSST phase-change material","authors":"Amir Hossein Abdollahi Nohoji,&nbsp;Parviz Keshavarzi,&nbsp;Mohammad Danaie","doi":"10.1016/j.rinp.2025.108338","DOIUrl":"10.1016/j.rinp.2025.108338","url":null,"abstract":"<div><div>This paper presents a novel architecture for all-optical photonic crystals, leveraging the integration of Mach-Zehnder interferometers and directional couplers for advanced optical neuromorphic synapses. By utilizing photonic crystals and germanium-antimony-selenium-tellurium (GSST) phase-change materials, we achieve precise control over optical transmission. The use of photonic crystals enables a compact footprint and significantly reduces the device size compared to conventional silicon photonics, offering a key advantage in achieving higher integration density for optical neuromorphic systems. Comprehensive finite-difference time-domain (FDTD) simulations demonstrate that incorporating a photonic crystal cavity at the input port significantly enhances single-mode operation, leading to an output signal transmission of more than 99 %. Furthermore, variations in the crystallinity fraction of phase-change material (PCM) rods significantly influence the output signal transmission, enabling precise control of the signal dynamics. Under amorphous and fully crystalline conditions of the GSST-PCM rods, the signal transmission rate varies between −0.02 dB and −13.5 dB, highlighting the profound impact of phase-state changes on system performance. This innovative photonic crystal platform offers a promising avenue for the realization of next-generation optical synapses, paving the way for advanced optical neural networks and machine learning.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108338"},"PeriodicalIF":4.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"A new tuning method based on quantitative compensation for uniform and non-uniform travelling-wave accelerating structures","authors":"Yu Yang,&nbsp;Bo Wang,&nbsp;Jinghe Yang,&nbsp;Aijun Cui,&nbsp;Yuepeng Lv,&nbsp;Cheng Qin,&nbsp;Yihuai Xiang,&nbsp;Lifeng Zhang,&nbsp;Zhibin Zhu","doi":"10.1016/j.rinp.2025.108337","DOIUrl":"10.1016/j.rinp.2025.108337","url":null,"abstract":"<div><div>In this paper, a new tuning method based on quantitative compensation for both uniform and non-uniform structures is proposed after analyzing the relationship between field distribution and RF parameters of each cavity based on the equivalent circuit model. Using field distributions measured when RF power is fed respectively into input and output ports, the frequency deviation of each cavity and both input and output coupling coefficients of the structure can be calculated quantitatively. The reflection caused by coupling coefficient deviation can be eliminated by detuning coupler cavity and the adjacent cavity quantitatively. And the frequency deviation, which is usually tuned by the tuning hole on the cavity, can be also compensated quantitatively by detuning the adjacent cavities especially when it’s not convenient or too large to be tuned by the tuning hole. A S-band non-uniform travelling wave accelerating structure has been tuned successfully with this method. The field distribution is tuned to be close to the design, the VSWR at the operating frequency is minimized to 1.0056 and these results verify the effectiveness of this method</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108337"},"PeriodicalIF":4.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144481589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Qualitative analysis of fractal–fractional order Coffee Berry epidemic model on an agricultural farm","authors":"M. Suresh Kumar ,&nbsp;N. Ramesh Babu ,&nbsp;S. Harshavarthini ,&nbsp;T. Sathiyaraj","doi":"10.1016/j.rinp.2025.108325","DOIUrl":"10.1016/j.rinp.2025.108325","url":null,"abstract":"<div><div>Coffee Berry Disease (CBD) poses a serious threat to global coffee production by reducing both yield and bean quality. Existing mathematical models based on classical integer-order calculus often fail to reflect the true dynamics of the disease, as they overlook memory effects and spatial variations commonly observed in agricultural systems. In this study, we introduce a new mathematical model called the Fractal–Fractional Coffee Berry Disease Infestation (FFCBDI) model. It is the first of its kind to apply Caputo-type fractal–fractional derivatives to model CBD progression. A key innovation in this model is the inclusion of a recovered berry compartment, which accounts for the possibility of re-infection due to environmental stress or pathogen persistence. The model incorporates two important parameters-fractional order and fractal dimension-to capture time delays and spatial heterogeneity more accurately. We analyze essential mathematical properties such as positivity, boundedness, existence, uniqueness, and stability. A bifurcation analysis is also performed to identify threshold values that determine whether the disease will spread or die out. Numerical simulations show how different parameter values influence disease dynamics. The proposed FFCBDI model offers a more realistic and flexible framework for understanding CBD transmission, which can support better prediction and control strategies in real-world agricultural settings.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108325"},"PeriodicalIF":4.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Synthesis and characterization of multifunctional CdO-CuO-ZnO-Co3O4 nanocomposite","authors":"A.M. Abdulwahab ,&nbsp;Thana Shuga Aldeen ,&nbsp;Shadha Nasser Aziz","doi":"10.1016/j.rinp.2025.108335","DOIUrl":"10.1016/j.rinp.2025.108335","url":null,"abstract":"<div><div>Since its individual nanoparticles have good properties and important applications, CdO-CuO-ZnO-Co₃O₄ nanocomposite was synthesized for the first time by using co-precipitation technique. These applications such as solar cells, photovoltaic cells, optical coatings, photocatalytic, phototransistors and supercapacitors can be enhanced after mixing the individual nanoparticles. The structural, morphological, and physical properties of the nanocomposite were characterized using various techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), total reflection X-ray fluorescence (TXRF), diffuse reflectance UV–Vis spectroscopy (DR), and vibrating sample magnetometers (VSM). The XRD analysis confirmed the formation of crystalline phases of CdO, CuO, ZnO, and Co₃O₄ in the nanocomposite. Transmission electron microscope (TEM) images of the nanocomposite sample showed spherical nanoparticles with an average particle size of 17 nm. TXRF analysis confirmed the presence of Cd, Cu, Zn, Co, and O in the nanocomposite. The optical response revealed distinct absorption patterns of CdO, CuO, ZnO, Co₃O₄ nanoparticles, as well as CdO-CuO-ZnO-Co₃O₄ nanocomposite, in the visible region between 400 nm and 700 nm. The nanocomposite exhibits a reduced optical band gap and significantly enhanced DC electrical conductivity compared to the individual nanoparticles, indicating improved light absorption and charge transport properties. The values of saturation magnetization (<em>M_s</em>), coercively magnetic field (<em>H_c</em>), retentively magnetization (<em>M_r</em>) and magnetic energy <em>U</em> (erg/g) for CdO-CuO-ZnO-Co₃O₄ nanocomposite were less than those of individual nanoparticles.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108335"},"PeriodicalIF":4.4,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"First-principles investigation of structural, electronic, optical, and thermoelectric properties of Li2X (X = Te, Se, S) chalcogenides for energy and optoelectronic applications","authors":"Muhammad Uzair ,&nbsp;Rajwali Khan ,&nbsp;Ayesha Nawab ,&nbsp;Asim Sajjad ,&nbsp;Sohail Mumtaz ,&nbsp;Nourreddine Sfina ,&nbsp;Vineet Tirth ,&nbsp;Ali Algahtani ,&nbsp;M.D. Alshahrani ,&nbsp;Salma Alshehri ,&nbsp;Mudasser Husain ,&nbsp;Nasir Rahman","doi":"10.1016/j.rinp.2025.108334","DOIUrl":"10.1016/j.rinp.2025.108334","url":null,"abstract":"<div><div>The structural, electronic, optical, elastic, and thermoelectric properties of Li₂X (X = S, Se, Te) chalcogenides were systematically investigated using density functional theory. Volume-energy analysis via Birch-Murnaghan fitting reveals that Li₂S exhibits the greatest structural stability. The bandgaps decrease from Li₂S (∼3.2 eV) to Li₂Se (∼1.8 eV) and Li₂Te (∼1.0 eV), correlating with lattice constants and chalcogen mass. Li₂Te’s narrow direct bandgap and strong hybridization suggest thermoelectric potential, while Li₂Se is promising for optoelectronics. Li₂S, with a wide bandgap and high ionic conductivity, is ideal for optical and solid-state electrolyte applications. Elastic analysis shows Li₂Se is the stiffest and most ductile, while Li₂Te and Li₂S show greater anisotropy. Optical results confirm that heavier chalcogens enhance reflectivity and metallicity, whereas lighter ones promote insulating behavior. These findings demonstrate the tunability of Li₂X compounds for diverse energy and electronic applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108334"},"PeriodicalIF":4.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}

{"title":"Asymmetric cloning of steering, quantum discord, and coherence","authors":"Irina Ion ,&nbsp;Iulia Ghiu","doi":"10.1016/j.rinp.2025.108323","DOIUrl":"10.1016/j.rinp.2025.108323","url":null,"abstract":"<div><div>Cloning of steering, quantum discord, and coherence is investigated by using two types of cloners: local and nonlocal <span><math><mrow><mn>1</mn><mo>→</mo><mn>2</mn></mrow></math></span> optimal universal asymmetric cloning machines. We prove the impossibility of generating two steerable output states when local cloners are used. On the other hand, when nonlocal cloning machines are employed, we show that there are ranges of the parameters which characterize the initial state and the cloning machines, such that the two output mixed states are steerable. Moreover, we obtain analytical expressions of the quantum discord and the coherence of the two output states generated by local and nonlocal asymmetric cloners. Further we make a detailed comparison of steering, quantum discord, and coherence of the output states obtained by local versus nonlocal cloning machines.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108323"},"PeriodicalIF":4.4,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144320982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}