Physica B-condensed Matter最新文献

Magnetic features of some extraterrestrial Fe-Ni-Co alloys: Study using magnetization measurements and Mössbauer spectroscopy 一些地外铁镍钴合金的磁性特征：使用磁化测量和Mössbauer光谱学的研究

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-08-02 DOI: 10.1016/j.physb.2025.417656

M.V. Goryunov , I. Felner , G. Varga , Z. Dankházi , A.V. Chukin , S.P. Naumov , G. Leitus , R.F. Muftakhetdinova , E. Kuzmann , Z. Homonnay , M.I. Oshtrakh

{"title":"Magnetic features of some extraterrestrial Fe-Ni-Co alloys: Study using magnetization measurements and Mössbauer spectroscopy","authors":"M.V. Goryunov , I. Felner , G. Varga , Z. Dankházi , A.V. Chukin , S.P. Naumov , G. Leitus , R.F. Muftakhetdinova , E. Kuzmann , Z. Homonnay , M.I. Oshtrakh","doi":"10.1016/j.physb.2025.417656","DOIUrl":"10.1016/j.physb.2025.417656","url":null,"abstract":"<div><div>Magnetic features of extraterrestrial Fe-Ni-Co alloys from iron and stony-iron meteorites were studied by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction, Mössbauer spectroscopy and magnetization measurements. SEM with EDS demonstrated the presence of different compositions of the α-Fe(Ni, Co), α<sub>2</sub>-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases in various alloys with variations in Ni concentrations. The Mössbauer spectra of Fe-Ni-Co alloys consist of different numbers of magnetic sextets. The values of <sup>57</sup>Fe hyperfine parameters were assigned to corresponding α-Fe(Ni, Co), α<sub>2</sub>-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases. The saturation magnetic moments for some Fe-Ni-Co alloys were slightly higher while those for other Fe-Ni-Co alloys were slightly lower than that of pure Fe. The zero-field-cooled (ZFC) and field-cooled (FC) branches of the magnetization curves showed unusual behavior for Fe-Ni-Co alloys from three meteorites when the ZFC curve lies over the FC one which is a very rare phenomenon.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"716 ","pages":"Article 417656"},"PeriodicalIF":2.8,"publicationDate":"2025-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144757657","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

“Impact of molybdenum doping on the optoelectronic and structural properties of CsPbIBr2 perovskite solar cell” [Physica B: Condensed Matter, 678 (2024), 415758] “钼掺杂对CsPbIBr2钙钛矿太阳能电池光电性能和结构性能的影响”[物理学报B：凝聚态物质，678 (2024),415758]

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-31 DOI: 10.1016/j.physb.2025.417639

M.I. Khan, Ali Mujtaba, Saddam Hussain, M. Atif, Ihtisham-ul Haq, Ahmed Iftikhar Qureshi, Wajeehah Shahid, Asghar Ali

引用次数: 0

Structural and optical study of optimized undoped and Cu-doped LaAlO3 优化未掺杂和cu掺杂LaAlO3的结构和光学研究

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-29 DOI: 10.1016/j.physb.2025.417625

Vishavdeep Kaur Dhaliwal, K. Singh

{"title":"Structural and optical study of optimized undoped and Cu-doped LaAlO3","authors":"Vishavdeep Kaur Dhaliwal, K. Singh","doi":"10.1016/j.physb.2025.417625","DOIUrl":"10.1016/j.physb.2025.417625","url":null,"abstract":"<div><div>Different compositions of undoped and Cu-doped LaAlO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> samples were synthesized using the solid-state reaction method with variable single-stage and double-stage heat treatments to obtain the monophasic LaAlO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>. The monophasic LaAlO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> sample is formed via double stage heat-treatment, i.e., 1100°C (2 h) followed by 1450°C (4 h). Their structural, morphological, and optical properties are characterized using X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, Field emission scanning electron microscopy with an attached energy dispersive spectroscopy, UV–Visible and Photoluminescence spectroscopy. Copper probably occupied the Al-O sites in the rhombohedral crystal structure, as confirmed by FTIR band shifting in the doped system. The optical band could be functionalized by Cu dopant, and it decreased in the Cu-doped LaAlO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>. The bandgap is in the semiconductor range, i.e., 2.4–1.8 eV. The developed materials may find applications in energy conversion devices as cathode materials in intermediate temperature solid oxide fuel cell applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417625"},"PeriodicalIF":2.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724003","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

Synthesizing solution processed W doped SnO2 as an effective ETL for all inorganic Cs(Ge0.5Sn0.5)I3 perovskite based solar cells: A combined experimental and simulation approach 合成溶液处理W掺杂SnO2作为所有无机Cs(Ge0.5Sn0.5)I3钙钛矿基太阳能电池的有效ETL：一种实验与模拟相结合的方法

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-29 DOI: 10.1016/j.physb.2025.417650

Avijit Talukdar, Joy Sarkar, Pratik Debnath, Subham Subba, Suman Chatterjee

{"title":"Synthesizing solution processed W doped SnO2 as an effective ETL for all inorganic Cs(Ge0.5Sn0.5)I3 perovskite based solar cells: A combined experimental and simulation approach","authors":"Avijit Talukdar, Joy Sarkar, Pratik Debnath, Subham Subba, Suman Chatterjee","doi":"10.1016/j.physb.2025.417650","DOIUrl":"10.1016/j.physb.2025.417650","url":null,"abstract":"<div><div>In inorganic perovskite solar cells (PSCs), the extraction and transportation of charge carriers are significantly influenced by metal oxide electron transport layers. The properties of SnO<sub>2</sub> electron transport layer (ETL) thin films prepared by the sol–gel spin coating method have been investigated in regard to the effects of W doping. We synthesized and characterized W:SnO<sub>2</sub> thin films using a combined experimental and computational approach. The Fermi level of the resulting film was slightly displaced upwards as a result of n-type W doping, which subsequently improved the electrical conductivity and facilitated the rapid transportation of photo-generated charge carriers. Our findings comprise a widened bandgap, improved crystallinity, conductivity, and optical transmittance. The perovskite solar cells' performance has been optimized in terms of its interface defect density, doping concentration, thickness, and defect concentration. The effect of series and shunt resistance on the performance of PSC has been investigated, leading to a power conversion efficiency (PCE) of 25.34 %, with V<sub>OC</sub> = 1.39 V, J<sub>SC</sub> = 21.75mA cm<sup>−2</sup>, and FF = 83.41 %. Further, Electrical impedance spectroscopy confirmed reduced recombination and enhanced charge transfer in W:SnO<sub>2</sub>-based devices. These findings demonstrate W:SnO<sub>2</sub> as a superior ETL, offering a scalable, lead-free solution for high-performance PSCs.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417650"},"PeriodicalIF":2.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144763696","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

Dual side-coupled plasmonic nanosensor for simultaneous detection of temperature and humidity 用于同时检测温度和湿度的双侧耦合等离子体纳米传感器

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-29 DOI: 10.1016/j.physb.2025.417646

Yongpeng Ren, Fumeng Qin, Desheng Qu, Yiping Sun, Chunlei Li

引用次数: 0

Enhancing solar-blind UV photodetection of Ga2O3-based photodetectors by using AlN passivation layer 利用AlN钝化层增强ga2o3基光电探测器的日盲紫外探测能力

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-29 DOI: 10.1016/j.physb.2025.417651

Mingyue Lv, Xining Ma, Min Zhang

{"title":"Enhancing solar-blind UV photodetection of Ga2O3-based photodetectors by using AlN passivation layer","authors":"Mingyue Lv, Xining Ma, Min Zhang","doi":"10.1016/j.physb.2025.417651","DOIUrl":"10.1016/j.physb.2025.417651","url":null,"abstract":"<div><div>In this work, Ga<sub>2</sub>O<sub>3</sub> thin films were deposited on c-plane sapphire and Si substrates via radio-frequency magnetron sputtering at room temperature. AlN passivation layers of varying thicknesses (0–15 nm) were then added, followed by the deposition of transparent ITO interdigitated electrodes, producing MISIM (metal-insulator-semiconductor-insulator-metal) photodetectors with enhanced solar-blind UV response. The device with a 10 nm AlN layer achieved a responsivity of 8.4 A/W, an external quantum efficiency (EQE) of 4108 %, and a photocurrent-to-dark current ratio (PDCR) of 8.4 × 10<sup>4</sup> at 10 V bias. Rather than reducing dark current, this improvement stems from increased photocurrent via photo-assisted Fowler-Nordheim tunneling. The passivation layer diminished defects at the electrode/semiconductor interface, enhancing electron-hole pair separation and further boosting the photodetection performance. These results demonstrate the critical role of interface engineering in optimizing Ga<sub>2</sub>O<sub>3</sub>-based photodetectors and highlight the potential of AlN passivation for deep-UV applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417651"},"PeriodicalIF":2.8,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739081","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

Dynamically tunable Fano resonance effect based on monolayer graphene with disk defect robustness 具有磁盘缺陷鲁棒性的单层石墨烯动态可调谐Fano共振效应

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-26 DOI: 10.1016/j.physb.2025.417638

Shenghao Liu, Fang Chen

{"title":"Dynamically tunable Fano resonance effect based on monolayer graphene with disk defect robustness","authors":"Shenghao Liu, Fang Chen","doi":"10.1016/j.physb.2025.417638","DOIUrl":"10.1016/j.physb.2025.417638","url":null,"abstract":"<div><div>Here, we introduce a tunable Fano resonance (FR) platform based on graphene metamaterials operating in the terahertz (THz) regime, demonstrating exceptional sensing performance with high sensitivity and stability. By engineering defects in both bright and dark modes of the resonant system, we systematically investigate their influence on the Fano resonance characteristics. Our findings reveal that while the position of bright-mode defects induces subtle modulation of the resonance, the size and position of dark-mode defects, as well as the size of bright-mode defects, exhibit negligible tuning effects. By dynamically tuning the Fermi level of graphene via external bias voltage, the Fano resonance exhibits a significant blue shift. Varying the Fermi level from 0.5 eV to 0.9 eV shifts the primary resonance peak by 0.94 THz, enabling active Fano spectral control for adaptive sensing. Besides, the proposed design showcases remarkable polarization insensitivity, maintaining stable transmission spectra across both polarization directions for incident angles up to 60°. Furthermore, the sensor achieves ultrahigh sensitivity and figure-of-merit (FOM) values of 1.36 THz/RIU and 5.425 1/RIU, respectively, positioning it as a promising candidate for advanced THz sensing applications.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417638"},"PeriodicalIF":2.8,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723867","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

Mechanical response of defective AlCoCrFeNi high-entropy alloys: Influence of void geometry and distribution 缺陷AlCoCrFeNi高熵合金的力学响应：空洞几何形状和分布的影响

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-25 DOI: 10.1016/j.physb.2025.417619

Thi-Nhai Vu , Van-Trung Pham , Yu-Jen Hsiao , Te-Hua Fang

{"title":"Mechanical response of defective AlCoCrFeNi high-entropy alloys: Influence of void geometry and distribution","authors":"Thi-Nhai Vu , Van-Trung Pham , Yu-Jen Hsiao , Te-Hua Fang","doi":"10.1016/j.physb.2025.417619","DOIUrl":"10.1016/j.physb.2025.417619","url":null,"abstract":"<div><div>This study employs molecular dynamics simulations to systematically investigate the effects of void geometry and spatial distribution on the mechanical response and deformation mechanisms of monocrystalline Al<sub>0</sub>.<sub>3</sub>CoCrFeNi high-entropy alloys under uniaxial tensile loading. The results indicate that as the void radius increases, tensile strength, flow stress, Young's modulus, and strain energy (<em>W</em>) tend to decrease while fracture toughness (K<sub><em>IC</em></sub>) increases. Samples with horizontal rectangle (H-rectangle) exhibit the highest tensile strength for a constant defect volume, whereas those with vertical hexagons (V-hexagons) show the lowest. The samples with more voids, such as H-2voids and 4voids, demonstrate better tensile properties. The deformation behavior analysis reveals that voids serve as the primary initiation sites for deformation in defective specimens, with larger void radii leading to an earlier onset of plastic deformation. Shrinkage is lowest in samples with horizontal hexagon (H-hexagon) and V-hexagon pores, while the highest shrinkage is observed in Vertical-2voids and Central-1void samples.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417619"},"PeriodicalIF":2.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144739124","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 exploration of ground state properties in a MoS2/MoSe2 core–shell nanowire: An ab initio approach MoS2/MoSe2核壳纳米线基态性质的探索：从头计算方法

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-25 DOI: 10.1016/j.physb.2025.417642

Geoffrey Tse

{"title":"The exploration of ground state properties in a MoS2/MoSe2 core–shell nanowire: An ab initio approach","authors":"Geoffrey Tse","doi":"10.1016/j.physb.2025.417642","DOIUrl":"10.1016/j.physb.2025.417642","url":null,"abstract":"<div><div>We describe a theoretical and computational approach to evaluate the structural, electronic, optical, mechanical, and vibrational properties of MoS<sub>2</sub>/MoSe<sub>2</sub> core–shell heterostructure using DFT calculations. The structure of a MoS<sub>2</sub>/MoSe<sub>2</sub> core–shell consists of vertical and horizontal heterostructures. A direct bandgap energy of 1.67 eV has been measured. The peak optical absorption falls within the UV-C region, indicating potential use as UV sensors and detectors. Over 87.5 % of light was reflected, suggesting this is a potential good absorber. Pugh's parameters suggest that the compound is brittle. A negative Poisson's ratio suggests this material may be a potential anode for metal-ion battery cells. We have also explored electron–phonon coupling; the dispersion plot shows negligible imaginary frequencies. The core–shell structure is dynamically stable, suggesting this material can be fabricated. The above result validates our MoS<sub>2</sub>/MoSe<sub>2</sub> core–shell structure prediction. This study provides a reliable dataset based on the nanowire transition metal di-chalcogenide (TMD) heterostructure.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417642"},"PeriodicalIF":2.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711444","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

Spatially resolved in situ defect spectroscopy during tensile tests using a scanning positron beam 在使用扫描正电子束的拉伸测试期间，空间分辨原位缺陷光谱

IF 2.8 3区物理与天体物理

Physica B-condensed Matter Pub Date : 2025-07-25 DOI: 10.1016/j.physb.2025.417613

Christoph Hugenschmidt, Matthias Thalmayr, Thomas Gigl

{"title":"Spatially resolved in situ defect spectroscopy during tensile tests using a scanning positron beam","authors":"Christoph Hugenschmidt, Matthias Thalmayr, Thomas Gigl","doi":"10.1016/j.physb.2025.417613","DOIUrl":"10.1016/j.physb.2025.417613","url":null,"abstract":"<div><div>We present a novel technique for analyzing materials <em>in situ</em> during tensile tests using a scanning positron microbeam. Doppler broadening spectroscopy (DBS) of the 511 keV annihilation line is used to measure the variation of the local defect concentration with a resolution of <span><math><mrow><mn>250</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> (FWHM). The evolution of the defect distribution during tensile tests is observed by recording two-dimensional (2D) defect maps as a function of stress and strain with an unprecedentedly short measurement time of 35 s per spectrum. We studied Al alloys (AlMg4.5Mn and Al99.5) at different stages of deformation in order to correlate the spatially resolved formation of lattice defects on an atomic level with the macroscopic material properties obtained by the recorded stress–strain curves. The onset of plastic deformation, i.e. the emergence of stress-induced defects, was clearly observed whereas elastic strain (Hook’s region) does not lead to changes in DBS spectra. Finally, observing the maximum local defect density enables prediction of the crack formation that is responsible for the specimen’s failure.</div></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":"715 ","pages":"Article 417613"},"PeriodicalIF":2.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749363","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