检索结果-内蒙古大学图书馆

Efficient method for calculating magnon-phonon coupling from first principles

Physical Review B 2025年第10期111卷 104431-104431页

作者： Wuzhang Fang Jacopo Simoni Yuan Ping Department of Materials Science and Engineering University of Wisconsin Madison 53706 WI United States Department of Materials Science and Engineering Department of Physics Department of Chemistry University of Wisconsin Madison 53706 WI United States

Linear magnon-phonon coupling hybridizes magnon and phonon bands at the same energy and momentum, resulting in an anticrossing signature. This hybrid quasiparticle benefits from a long phonon lifetime and efficient magnon transport, showing great potential for spintronics and quantum information science applications. In this paper, we present an efficient and accurate first-principles approach for calculating linear magnon-phonon couplings. We first calculate the magnon spectra from linear spin-wave theory with spin Hamiltonian and first-principles exchange constants, which compared well with time-dependent density-functional theory. We then obtain the magnon-phonon coupling from the derivative of off-diagonal exchange constants in real space, calculated from the Hellmann-Feynman forces of the spin-constrained configurations, avoiding the use of cumbersome finite-difference methods. Our implementation allows calculating coupling coefficients at an arbitrary wave vector in the Brillouin zone in a single step, through Fourier interpolation of real-space supercell calculations. We verify our implementation through two-dimensional magnetic systems, monolayer CrI3, in agreement with experiments, and extend its application to monolayer CrTe2. We emphasize the role of nonmagnetic atoms in superexchange interactions and magnon-phonon coupling, which have been overlooked previously. We suggest effective tuning of magnon-phonon coupling through strain, doping, and terahertz excitations, for spintronics and quantum magnonics applications.

关键词： Hamiltonians

来源：评论

学校读者我要写书评

暂无评论

Reducing the Voc Loss of Hole Transport Layer-Free Carbon-Based Perovskite Solar Cells via Dual Interfacial Passivation

引用

Nano-Micro Letters 2025年第1期17卷 1-15页

作者： Zhang, Xian Liu, Fangzhou Guan, Yan Zou, Yu Wu, Cuncun Shi, Dongchang Zhang, Hongkai Yu, Wenjin Zou, Dechun Zhang, Yangyang Xiao, Lixin Zheng, Shijian Key Laboratory of Materials Laminating Fabrication and Interface Control Technology of Tianjin School of Materials Science and Engineering Hebei University of Technology Tianjin300401 China College of Chemistry and Molecular Engineering Peking University Beijing100871 China State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University Beijing100871 China

Li2CO3 is used to modify conformal SnO2 as electron transport layer for hole transport layer-free carbon-based perovskite solar cells (C-PSCs). CO32− can induce MA release from the perovskite layer, resulting in PbI2 at the grain boundary of top interface of perovskite film which can passivate the grain boundary and the top surface defects. The Li2CO3-modified C-PSC exhibits a high power conversion efficiency (PCE) of 19.1%, with a Voc of 1.142 V. A record-high PCE of 33.2% is obtained under weak light-emitting diode illumination (2000 lx, 3000 K). © The Author(s) 2025.

关键词： Grain boundary sliding

来源：评论

学校读者我要写书评

暂无评论

Broadband Optical Nonlinearities and Ultrafast Carrier Dynamics of GO-CuS Hybrid Film

引用

Journal of Lightwave Technology 2025年第11期43卷 5381-5389页

作者： Zhang, Xuefeng Bai, Xuli Liu, Xiaofei Wang, Dan Han, Hong Xiao, Zhengguo Zhang, Jianguo Nie, Zhongquan Taiyuan University of Technology College of Materials Science and Engineering Institute of New Carbon Materials Taiyuan030024 China Taiyuan University of Technology Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province College of Electronic Information and Optical Engineering Taiyuan030024 China Taiyuan Institute of Technology Department of Science Taiyuan030008 China Tongren University Department of Physics and Electronic Engineering Tongren China National University of Defense Technology College of Advanced Interdisciplinary Studies Changsha410073 China

We report the broadband optical nonlinearities and ultrafast carrier dynamics of GO doped with CuS nanoparticles (GO-CuS) following the femtosecond pulse lasers. Both the pure GO and GO-CuS hybrid films are first synthesized by the vacuum filter deposition method and their optical nonlinearities are then examined in the wide wavelength range (400 nm-1064 nm) based on the femtosecond Z-scan technique. The results reveal that, compared to the pristine GO, the introduction of CuS not only makes the GO-CuS hybrid film switched from saturated absorption to reverse saturated absorption possible, but also achieves strong broadband optical nonlinear absorption responses and optical limiting effects. It is demonstrated that the strongest nonlinear absorption coefficient (∼3.6×10-7 m/W) appears at 400 nm excitation, which is dozens of times larger than that under the illumination of 1064 nm. By leveraging the femtosecond pump-probe technique, we further study the ultrafast carrier dynamics of the GO-CuS hybrid film carrying the fast and slow relaxation processes. Moreover, the physical mechanisms behind these excellent nonlinear optical responses are elucidated. The findings presented here indicate that the GO-CuS hybrid film can be regarded as a potential promising candidate in various ultrafast photonics devices. © 1983-2012 IEEE.

关键词： Femtosecond lasers

来源：评论

学校读者我要写书评

暂无评论

Simulation on atmospheric pressure barrier discharge with varying relative position between two wavy dielectric surfaces

引用

Chinese physics B 2025年第3期34卷 474-481页

作者： Xue-Chen Li Wen-Jie Wan Xiao-Qian Liu Mo Chen Kai-Yue Wu Jun-Xia Ran Xue-Xia Pang Xue-Xue Zhang Jia-Cun Wu Peng-Ying Jia Hui Sun College of Physics Science and Technology Hebei UniversityBaoding 071002China Engineering Research Center of Zero-carbon Energy Buildings and Measurement Techniques Ministry of EducationBaoding 071002China Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Hebei Key Laboratory of Photo-Electricity Information and Materials Hebei UniversityBaoding 071002China University of Chinese Academy of Sciences College of Materials and Opto-Electronic TechnologyBeijing 100049China

As a popular approach to producing atmospheric pressure non-thermal plasma,dielectric barrier discharge(DBD)has been extensively used in various application *** this paper,DBD with wavy dielectric layers is numerically simulated in atmospheric pressure helium mixed with trace nitrogen based on a fluid *** varying relative position(phase difference(Δφ))of the wavy surfaces,there is a positive discharge and a negative discharge per voltage cycle,each of which consists of a pulse stage and a hump *** the pulse stage,maximal current increases with increasingΔφ.Results show that DBD with the wavy surfaces appears as discrete micro-discharges(MDs),which are self-organized to different patterns with varyingΔφ.The MDs are vertical and uniformly-spaced withΔφ=0,which are self-organized in pairs withΔφ=π/*** MD pairs are merged into some bright wide MDs withΔφ=π/*** addition,narrow MDs appear between tilted wide MDs withΔφ=3π/***Δφ=π,the pattern is composed of wide and narrow MDs,which are vertical and appear *** elucidate the formation mechanism of the patterns with differentΔφ,temporal evolutions of electron density and electric field are investigated for the positive ***,surface charge on the wavy dielectric layers has also been compared with differentΔφ.

关键词： dielectric barrier discharge wavy dielectric surface micro-discharge fluid model

来源：评论

学校读者我要写书评

暂无评论

SWIR-transparent silicon hot-carrier photodetector for unobstructed real-time laser power monitoring

引用

Optica 2025年第5期12卷 654-665页

作者： Ryu, Eui-Hyoun Hwang, Sunghyun Kim, Nayeon Son, Ji-Hwan Han, Jae-Hoon Ahn, Jongtae Park, Donghee Seong, Tae-Yeon Lee, In-Ho Seoul02792 Korea Republic of Department of Materials Science and Engineering Korea University Seoul02841 Korea Republic of School of Electrical Engineering Korea University Seoul02841 Korea Republic of Korea University Department of Micro/Nano Systems Seoul02841 Korea Republic of Department of Physics Changwon National University Changwon51139 Korea Republic of

Optically transparent photodetectors are becoming essential components in next-generation photonic technologies such as augmented reality and light-field imaging. While transparent photodetectors have been extensively developed for the visible spectrum, extending this capability to the short-wavelength infrared (SWIR) regime remains a significant challenge. This is primarily due to the lack of suitable transparent electrodes and the difficulty in minimizing the thickness of light-absorbing layers. In this work, we demonstrate an SWIR-transparent silicon hot-carrier photodetector, enabled by an ultrathin silver film topped with a high-refractive-index overlayer, serving as a transparent electrode. The electrode design exploits destructive interference to minimize reflection, achieving an 86% transmittance at 1300 nm and a normalized transmittance of 123% relative to a silicon substrate. Integrating this electrode into a silicon substrate forms a metal–silicon Schottky junction for SWIR photon detection through hot-carrier injection, with photon absorption confined to a sub-10 nm metal layer. By leveraging the optical transparency of our photodetector, we demonstrate a laser power monitoring strategy that enables real-time optical power measurements without compromising the spatial profile of the laser beam and altering its optical path. This work paves the way for compact, streamlined designs in applications such as optical data transmission and light detection and ranging (LiDAR), where continuous laser power monitoring is crucial. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Photodetectors

来源：评论

学校读者我要写书评

暂无评论

Correction to:Improving exposure of anodically ordered Ni-Ti-O and corrosion resistance and biological properties of NiTi alloys by substrate electropolishing

引用

Rare Metals 2025年第1期44卷 662-663页

作者： Yong-Hua Sun Ya Zhao Yu-Yu Zhao You-Jie Rong Run-Hua Yao Xiao-Hong Yao Rui-Qiang Hang Paul K.Chu Laboratory of Biomaterial Surfaces and Interfaces Institute of New Carbon MaterialsTaiyuan University of TechnologyTaiyuan030024China Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongKowloon999077Hong KongChina

The authors like to replace Fig.4 of the original publication with that provided in this Correction.

关键词： corrosion alloys resistance

来源：评论

学校读者我要写书评

暂无评论

Antibacterial Properties of Carbon Fiber/Polyether Ether Ketone Artificial Bone Composites Modified by Black Phosphorus Coating Assisted by Wet Chemical Nitration Surface Treatment

引用

Journal of Bionic engineering 2025年第2期22卷 838-850页

作者： Luxiao Sang Hao Li Runze Shi Wen Qin Tong Xing Shengnan Qin Aoqun Jian Shanxi Key Laboratory of Micro Nano Sensors and Artificial Intelligence Perception College of Physics and Optoelectronic EngineeringTaiyuan University of TechnologyTaiyuan030024China Department of Materials Science and Engineering Shanxi Institute of TechnologyYangquan045000China The Fifth Clinical Medical College of Shanxi Medical University Shanxi Provincial People’s HospitalTaiyuan030012China

The poor surface antibacterial properties are one of the important factors limiting the application of Carbon Fibers Reinforced Polyetheretherketone (CFR-P) composites as artificial bone replace materials. Some of the Two-Dimensional (2D) nanomaterials with unique lamellar structures and biological properties have been demonstrated to have excellent antibacterial properties. Antibacterial properties can be improved by feasible chemical strategies for preparing 2D nanomaterials coating on the surface of CFR-P. In this work, Black Phosphorus (BP) coating was prepared on the originally chemically inert CFR-P surface based on wet chemical pretreatment. The physical and chemical properties, including surface microstructure, chemical composition and state, roughness and hydrophilicity were characterized. The antibacterial ratios against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Streptococcus mutans (S. mutans) were evaluated. The results indicated that hydrophilicity of BP coating on CFR-P was significantly higher compared to that of the pure CFR-P. Wet chemical pretreatment using mixed acid reagents (concentrated sulfuric acid and concentrated nitric acid) introduced hydroxyl, carboxyl and nitro groups on CFR-P. The BP coating exhibited the antibacterial rate of over 98% against both S. aureus and E. coli. In addition, the antibacterial rate of BP coating against the main pathogenic bacteria of dental caries, Streptococcus mutans, reached 45%.

关键词： Carbon fiber reinforced peek composites Surface modification Black phosphorus Microstructure Antibacterial property

来源：评论

学校读者我要写书评

暂无评论

Carbon nanofiber catalysts containing high-entropy metal phosphides with low-content Ru for highly efficient hydrogen evolution reaction

引用

Rare Metals 2025年第1期44卷 324-335页

作者： Peng Wang Jie Zheng Xue-Hao Li Wen-Bo Cui Jin-Hua Liu Yong Wan Jun Zhang Yusuke Yamauchi Zhong-Li Wang Mang Niu Yun-Ze Long Shandong Key Laboratory of Medical and Health Textile Materials College of PhysicsQingdao UniversityQingdao 266071China Industrial Research Institute of Nonwovens and Technical Textiles Shandong Center for Engineered Nonwovens(SCEN)College of Textiles ClothingQingdao UniversityQingdao 266071China State Key Laboratory of Bio-Fibers and Eco-textiles Institute of Biochemical EngineeringCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology(AIBN) The University of QueenslandBrisbaneQLD 4072Australia Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Materials Process Engineering Graduate School of EngineeringNagoya UniversityNagoya 464-8603Japan Tianjin Key Laboratory of Applied Catalysis Science and Technology School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China

High-entropy metal phosphide(HEMP)has considerable potential as an electrocatalyst owing to its beneficial properties,including high-entropy alloy synergy as well as the controllable structure and high conductivity of ***,electrospinning and in situ phosphating were employed to prepare three-dimensional(3D)networks of self-supporting HEMP nanofibers with varying degrees of phosphate *** characterizations via X-ray diffraction and X-ray photoelectron spectroscopy,as well as density functional theory calculations,demonstrate that the introduction of phosphorus(P)atoms to HEMP carbon nanofibers mediates their electronic structure,leads to lattice expansion,which in turn enhances their catalytic performance in the hydrogen evolution reaction(HER).Moreover,the formation of metal-P bonds weakens metal-metal interaction and decreases the free energy of hydrogen adsorption,contributing to the exceptional activity observed in the HEMP *** measurements demonstrate that the HEMP-0.75 catalyst with an ultralow loading of 1.22 wt%ruthenium(Ru)exhibits the highest HER catalytic activity and stability in a 1 M KOH electrolyte,achieving a minimal overpotential of 26 mV at a current density of 10 mA·cm^(-2)and Tafel slope of 50.9 mV·dec^(-1).

关键词： High-entropy metal phosphide Electrospinning Hydrogen evolution reaction Self-supporting carbon nanofibers

来源：评论

学校读者我要写书评

暂无评论

Room temperature aqueous-phase hydrogenation coupling with green hydrogen: Sustainable technologies innovating by efficient Co-CoO_(x)@NC catalyst derived from N-induced interfacial electron rearrangement

引用

Nano Research 2025年第2期18卷 141-152页

作者： Yue Shen Chun Chen Zidan Zou Wenchao Li Yunxia Zhang Haimin Zhang Zhixin Yu Huijun Zhao Guozhong Wang Key Laboratory of Materials Physics Centre for Environmental and Energy NanomaterialsAnhui Key Laboratory of Nanomaterials and NanotechnologyInstitute of Solid State PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Department of Energy and Petroleum Engineering University of Stavanger4036 StavangerNorway Centre for Clean Environment and Energy Gold Coast CampusGriffith UniversityQueensland 4222Australia

Utilization and storage are the two main themes of green *** hydrogen-involved system,development of highly active catalysts to achieve catalytic hydrogenation under mild conditions is a prerequisite for coupling with green hydrogen,so that green hydrogen with low outlet pressure can be directly used as a hydrogen *** achieve this aim,we developed a high active Co-CoOx@NC catalyst with metal/metal oxide induced by *** work function and Bader charge calculations reveal that N-doping can induce interfacial electrons rearrangement to form Co-CoOx interface on the surface of Co nanoparticles(NPs).The interface is the dual active sites,where Co plays a role in H_(2) dissociation and CoOx can enhance the adsorption and activation of aldehyde *** from traditional dissimilar metal/oxide interface,the Co-CoOx interface can effectively shorten hydrogen spillover distance and energy barrier,and thus exhibits high catalytic performance in hydrogenation of a variety of bio-derived aldehydes under aqueous-phase and mild reaction conditions that can couple with green hydrogen.

关键词： green hydrogen N-doping dual active sites interface hydrogenation

来源：评论

学校读者我要写书评

暂无评论

Feasibility Study of Precoated Binder-Type Electric Arc Furnace Oxidizing Slags as Aggregates for Cement Mortar 1st

Feasibility Study of Precoated Binder-Type Electric Arc Furn...

引用

1st International Conference on Net-Zero Built Environment: Innovations in materials, Structures, and Management Practices, NTZR 2024

作者： Lin, Wei-Ting Sprince, Andīna Hebda, Marek Mucsi, Gábor Cheng, An Pan, Huang-Hsing Department of Civil Engineering National Ilan University Yilan Taiwan Institute of Civil Engineering Faculty of Civil and Mechanical Engineering Riga Technical University Riga Latvia Department of Materials Engineering Faculty of Materials Engineering and Physics Cracow University of Technology Kraków Poland Institute of Raw Materials Preparation and Environmental Technologies University of Miskolc Miskolc Hungary Department of Civil Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan

ISBN: (纸本)9783031696251

The study used electric arc furnace oxidizing slag (EAFOS) to substitute natural fine aggregates. However, EAFOS replacement may cause volumetric instability. Therefore, a cement, fly ash, or slag layer was coated with EAFOS as a precoated technique. Then, the effect of EAFOS on engineering properties was investigated, and the optimum amount of EAFOS was identified. The amount of coated binders was set at 20%, 25%, 30%, 35%, and 40% of the weight of EAFOS, and the water-to-binder ratio (w/b) of the coated binders was fixed at 0.50 to 0.20. The proportion of EAFOS replacing fine aggregates was 10%, 20%, 30%, 40%, and 50%, and the w/b of the mortar was fixed at 0.55. The results showed that the proportion of precoated binder was 30% of the EAFOS and the w/b was 0.30. Curing time was up to 28 days, and slag was the appropriate precoated binder. Maximum compressive strengths of mortars made with precoated EAFOS were 42.94 and 56.96 MPa at 7 and 28 days (40% replacement for fine aggregates). The maximum compressive strengths of specimens without coated EAFOS were 36.67 and 47.55 MPa at 7 and 28 days (the identical replacement). The drying shrinkage of 40% precoated slag specimens was 0.054% at 7 days and 0.074% at 28 days. The appearance of the specimens did not reveal any abnormality after 28 days of immersion in water at 70 °C. The precoated technique adopted in this study can be used as a stabilization procedure for replacing natural fine aggregates with EAFOS. © The Author(s) 2025.

关键词： Mortar

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：