Current Applied Physics最新文献_第8页

Dirac nodal line and pseudo-gap in 1T-VS2 single crystal 1T-VS2单晶中的Dirac节线和赝隙

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-06-09 DOI: 10.1016/j.cap.2025.06.005

Mincheol Kim , Hyuk Jin Kim , Byoung Ki Choi , Tae Gyu Rhee , Chris Jozwiak , Aaron Bostwick , Eli Rotenberg , Sunghun Lee , Young Jun Chang

{"title":"Dirac nodal line and pseudo-gap in 1T-VS2 single crystal","authors":"Mincheol Kim , Hyuk Jin Kim , Byoung Ki Choi , Tae Gyu Rhee , Chris Jozwiak , Aaron Bostwick , Eli Rotenberg , Sunghun Lee , Young Jun Chang","doi":"10.1016/j.cap.2025.06.005","DOIUrl":"10.1016/j.cap.2025.06.005","url":null,"abstract":"<div><div>Vanadium disulfide (VS2), one of transition metal dichalcogenide (TMDC) family, attracts elevated interests for its charge-density wave phase transition, ferromagnetism, optoelectronic switching, and catalytic reactivity, but the topological Dirac surface states have not been observed yet. Here we report the Dirac nodal line states of VS2 single crystals via angle-resolved photoemission spectroscopy (ARPES) measurements. ARPES analysis reveals that Dirac nodal line surface states are extended from the Μ point toward the Γ point with energy of −1.1 eV. Comparison with the other vanadium chalcogenides shows monotonic energy shift of the Dirac states depending on the spin-orbit coupling strength of the chalcogen atoms. Furthermore, we studied the temperature-dependence of pseudo gaps near both the M and Γ points. Our observations provide experimental evidence of topological electronic structures, contributing to the understanding of the correlated TMDC systems and their potential in switching devices, optical saturable absorber, and electrocatalysis.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 94-99"},"PeriodicalIF":2.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Griffiths phase and magnetocaloric behaviors of Co-doped Nd0.6Sr0.4MnO3 共掺杂Nd0.6Sr0.4MnO3的Griffiths相和磁热行为

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-06-05 DOI: 10.1016/j.cap.2025.06.001

Tran Dang Thanh , Kim T.H. My , Do Hung Manh , The-Long Phan , D.-H. Kim

{"title":"Griffiths phase and magnetocaloric behaviors of Co-doped Nd0.6Sr0.4MnO3","authors":"Tran Dang Thanh , Kim T.H. My , Do Hung Manh , The-Long Phan , D.-H. Kim","doi":"10.1016/j.cap.2025.06.001","DOIUrl":"10.1016/j.cap.2025.06.001","url":null,"abstract":"<div><div>Nd0.6Sr0.4Mn1-yCoyO3 (y = 0–0.09) compounds have been fabricated by using solid-state reactions. X-ray diffraction analyses reveal their monophase in the Imma orthorhombic structure. When y increases, there are gradual reductions of the unit-cell parameters and porosity. Concurrently, the Curie temperature (TC) also reduces from 280 K (y = 0) to ∼232 K (y = 0.09). In the vicinity of TC, we have observed the Griffiths phase that more develops as increasing y. The presence of this phase enhances magnetocaloric responses, corresponding to the operating range widened above 95 % and the cooling power enhanced ∼30 % for an applied field H = 30 kOe. All materials exhibit the characters of a second-order phase transition with a narrow hysteresis loop, suggesting their applicability in magnetic cooling devices operating below room temperature. A coexistence of Mn3+,4+ and Co3+,4+ ions is thought to establish randomly competing ferromagnetic and antiferromagnetic interactions in Nd0.6Sr0.4Mn1-yCoyO3 compounds that widen the Griffiths phase, short-range magnetic ordering, and magnetocaloric response.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 85-93"},"PeriodicalIF":2.4,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Improved ultraviolet resistant through the natural antioxidants in efficient perovskite photovoltaics 通过在高效钙钛矿光伏电池中添加天然抗氧化剂来提高其抗紫外线性能

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-06-04 DOI: 10.1016/j.cap.2025.05.014

Xueyuan Li , Yaru Du , Niqian Du , Shanshan Du , Tianxiao Liu , Kaikai Liu , Zhiyong Liu

引用次数: 0

Photoluminescent characteristics of novel CaGdAl3O7: Sm3+ nanophosphors for WLEDs wled用新型CaGdAl3O7: Sm3+纳米荧光粉的光致发光特性

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-06-02 DOI: 10.1016/j.cap.2025.06.002

Mansi Malik, Dinesh Kumar

{"title":"Photoluminescent characteristics of novel CaGdAl3O7: Sm3+ nanophosphors for WLEDs","authors":"Mansi Malik, Dinesh Kumar","doi":"10.1016/j.cap.2025.06.002","DOIUrl":"10.1016/j.cap.2025.06.002","url":null,"abstract":"<div><div>This report presents an inclusive examination into synthesis, structural and optical properties of Sm3+ activated CaGdAl3O7 nanophosphors, aimed to develop tuneable luminous materials for applications i.e. white-light-emitting diode (WLED). Sm3+ activated CaGdAl3O7 nanophosphors have been synthesised via combustion method. Phase purity of synthesised nanophosphors was affirmed via PXRD (Powder X-ray diffraction analysis). TEM (Transmission Electron Microscopy) and SEM (Scanning Electron Microscopy) study was accomplished to analyse size and surface morphology. EDAX (Energy dispersive X-ray) analysis approves the existence of different element. The PL (Photoluminescence) emission spectra of all samples were recorded upon excitation at 402 nm suggesting orange red emission around 598 nm pertaining to transition 4G5/2 → 6H7/2 of Sm3+ ions. The optimal Sm3+ concentration was recognized at 7 mol%. Optical bandgap of 3.99 eV was evaluated for CaGd0.93Sm0.07Al3O7 sample. CIE coordinates were (0.634, 0.365) and CCT value (2096 K) of CaGd0.93Sm0.07Al3O7 demonstrates emission of light in warmer region.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 76-84"},"PeriodicalIF":2.4,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144242481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Epitaxial Sr-doped nickelate perovskite thin films and Ruddlesden-Popper phases grown by magnetron sputtering 磁控溅射生长外延掺锶镍钙钛矿薄膜和Ruddlesden-Popper相

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-05-31 DOI: 10.1016/j.cap.2025.05.012

Changhwan Kim , Min Young Jung , Yeong Gwang Khim , Kyeong Jun Lee , Young Jun Chang , Seo Hyoung Chang

{"title":"Epitaxial Sr-doped nickelate perovskite thin films and Ruddlesden-Popper phases grown by magnetron sputtering","authors":"Changhwan Kim , Min Young Jung , Yeong Gwang Khim , Kyeong Jun Lee , Young Jun Chang , Seo Hyoung Chang","doi":"10.1016/j.cap.2025.05.012","DOIUrl":"10.1016/j.cap.2025.05.012","url":null,"abstract":"<div><div>Sr-doped nickelate, Nd1-xSrxNiO3 (NSNO), perovskite thin films and Ruddlesden-Popper (RP) phases are actively investigated because of their physical properties, such as the metal-insulator transition and superconductivity. However, achieving epitaxial growth of NSNO perovskite and RP phase films in a sputtering system is challenging compared to pulsed laser deposition and molecular beam epitaxy, due to the difficulty in stabilizing nickel oxidation states and minimizing structural defects. Here, we used an off-axis radio frequency (RF) magnetron sputtering to fabricate epitaxial NSNO perovskite and RP phase thin films on SrTiO3 (001) substrates, systematically controlling the growth temperatures. We investigated the thermal stability of the perovskite phase and the structural and electronic characteristics of the RP phase films. These findings provide valuable insights into the synthesis of nickelate RP phase films using RF magnetron sputtering, paving the way for scalable thin films fabrication technologies.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 57-62"},"PeriodicalIF":2.4,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

MoS2 sensitized tapered fiber optic evanescent wave sensor for refractive index based glucose sensing application MoS2增感锥形光纤倏逝波传感器在折射率葡萄糖传感中的应用

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-05-30 DOI: 10.1016/j.cap.2025.05.015

S. Praveena , G. Melwin , P. Ramesh Babu , K. Senthilnathan

{"title":"MoS2 sensitized tapered fiber optic evanescent wave sensor for refractive index based glucose sensing application","authors":"S. Praveena , G. Melwin , P. Ramesh Babu , K. Senthilnathan","doi":"10.1016/j.cap.2025.05.015","DOIUrl":"10.1016/j.cap.2025.05.015","url":null,"abstract":"<div><div>In this paper, a two-dimensional (2D) molybdenum disulfide (MoS2) coated tapered multimode optical fiber sensor is proposed and its characteristics of refractive index sensing are investigated for the application of glucose monitoring. An highly efficient chemical etching approach has been carried out for tapering the multimode optical fiber. The tapered region is coated with MoS2 nanosheets and they are synthesized by using a cost-effective liquid phase exfoliation [LPE] method. The ideal solvent for exfoliation has been chosen by comparing the deposition using isopropyl alcohol (IPA) and dimethyl formamide (DMF) solvents. It is found that DMF is an ideal solvent for the 2D MoS2 nanosheet synthesis as well as for the deposition of the nanosheets over the optical fiber substrate. The optical deposition method is chosen for integrating the synthesized 2D MoS2 with the tapered optical fiber. The sensitivity is 25, 297, and 525 %/RIU for the uniform multimode fiber, tapered multimode fiber, and MoS2 coated tapered multimode optical fiber sensor, respectively. The MoS2-coated tapered fiber exhibits the highest sensitivity of 1.7 times and 21 times more than that of the tapered and uniform optical fiber sensor probes. Along with the high sensitivity, the MoS2-coated tapered optical fiber sensor probe also possesses high linearity for the change in the RI in the range of 1.33–1.41. It is found this sensor can be operated at any wavelength range from 400 to 1000 nm. Further, we believe that the proposed sensor probe using the intensity interrogation method would turn out to be a potential candidate for health monitoring as it exhibits high sensitivity, linearity, repeatability, and longevity.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 46-56"},"PeriodicalIF":2.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Synthesis of Ag and Pt-loaded g-C3N4 nanocomposite catalysts for improved Hydrogen evolution reaction Ag和pt负载g-C3N4纳米复合催化剂的合成及其对析氢反应的影响

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-05-28 DOI: 10.1016/j.cap.2025.05.013

Aditya Sharma , Harsha Devnani , Jitendra Pal Singh , Mayora Varshney , Hyun Joon Shin

{"title":"Synthesis of Ag and Pt-loaded g-C3N4 nanocomposite catalysts for improved Hydrogen evolution reaction","authors":"Aditya Sharma , Harsha Devnani , Jitendra Pal Singh , Mayora Varshney , Hyun Joon Shin","doi":"10.1016/j.cap.2025.05.013","DOIUrl":"10.1016/j.cap.2025.05.013","url":null,"abstract":"<div><div>This study reports the synthesis of g-C3N4, g-C3N4@Ag, and g-C3N4@Pt nanocomposites, along with their investigation into the hydrogen evolution reaction (HER). X-ray diffraction results confirmed the formation of pure g-C3N4, g-C3N4@Ag, and g-C3N4@Pt crystalline phases. The estimated crystallite sizes of pure g-C3N4, Pt nanoparticles, and Ag nanoparticles are 3.8 nm, 6.4 nm, and 16.4 nm, respectively. Transmission electron microscopy results reveal the 2D sheet morphology of pure g-C3N4 and the granular morphology of Ag- and Pt-loaded g-C3N4 samples. The electrochemical investigation reveals the superior HER performance of g-C3N4@Pt composite, surpassing the pristine g-C3N4 alone and g-C3N4@Ag. The g-C3N4@Pt exhibits a lower overpotential (100 mV at the current density of 10 mA cm−2), smaller Tafel slope (77 mV⋅dec−1), and long-term stability tests, which emphasize the practical applicability of these composites under HER conditions.</div></div>","PeriodicalId":11037,"journal":{"name":"Current Applied Physics","volume":"77 ","pages":"Pages 39-45"},"PeriodicalIF":2.4,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Magnetocaloric effect of LaFe13−xSix(x = 1.3, 1.4, 1.5) composites – A comparative study LaFe13−xSix（x = 1.3, 1.4, 1.5）复合材料的磁热效应比较研究

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-05-26 DOI: 10.1016/j.cap.2025.05.009

Qianhui Mao , Hengchang Xu , Xianxiang Wang , Yuan Wang , Haidong Li , Lisha Xue , Yang Liu , Jinqin Ye , Jun Ding , Xiaofan Xu , Jinhu Yang

引用次数: 0

Mechanical properties and deformation characteristic of few-layer gold nanolayers 少层金纳米层的力学性能及变形特性

IF 2.4 4区物理与天体物理

Current Applied Physics Pub Date : 2025-05-26 DOI: 10.1016/j.cap.2025.05.011

Thi-Xuyen Bui , Yu-Sheng Lu , Te-Hua Fang

引用次数: 0

Research on dynamic transport and intelligent distribution of dielectric fluids driven by non-uniform electric fields 非均匀电场驱动下介质流体的动态输运与智能分布研究