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Superconductivity, electronic phase diagram, and pressure effect in Sr_(1-x)Pr_xFBiS_2

Science china(physics,Mechanics & Astronomy) 2019年第5期62卷 99-106页

作者： Wei You lin Li HaiYang Yang JiaLu wang HongYing Mao Li Zhang ChuanYing Xi Jie Cheng YongKang Luo JianHui Dai YuKe Li Department of physics and Hangzhou Key Laboratory of Quantum Matter Hangzhou Normal University Department of physics China Jiliang University High Magnetic Field Laboratory Chinese Academy of Sciences College of Science Center of Advanced Functional Ceramics Nanjing University of Posts and Telecommunications Wuhan National High Magnetic Field Center school of physics Huazhong University of Science and Technology

Based on a combination of X-ray diffraction, electrical transports, magnetic susceptibility, specific heat, and pressure-effect measurements, we report the results of experiments on a series of BiS_2.based Sr_(1-x)Pr_xFBiS_2.superconductors with the maximum Tcof 2.7 K for x=0.5 and at ambient pressure. Superconductivity appears only for 0.4≤x≤0.7 whereas the normal-state resistivity shows the semiconducting-like behaviors. The magnetic susceptibility χ(T) displays the low superconducting shielding volume fractions and C(T) shows no distinguishable anomaly near Tc, which suggests a filamentary superconductivity in the Pr-doped polycrystalline samples. By varying doping concentrations, an {2. phase diagram is established. Upon applying pressure on the optimally doped Sr_(0.5)Pr_(0.5)FBiS_2.system, Tcis abruptly enhanced, reaches 8.5 K at the critical pressure of P_c=1.5 GPa, and increases slightly to 9.7 K at 2.5 GPa. Accompanied by the enhancement of superconductivity from the low-to the high-Tc phases, the normal state undergoes a semiconductor-to-metal transition when under pressure. This scenario may be linked to enhanced overlap of the Bi-6 p and S-p orbitals, which contributes to the enhanced superconductivity above Pc. The pressuretemperature phase diagram for Sr_(0.5)Pr_(0.5)FBiS_2.is also presented.

关键词： BiS2.based superconductors superconductivity phase diagram pressure effect

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多模式遮挡效应对多晶硅光伏组件输出性能的影响研究

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楚雄师范学院学报 2024年第3期39卷 8-15页

作者：宋向波王康刘明刘廷森唐艳玲刘爽林顺伦楚雄师范学院物理与电子科学学院云南楚雄675000 曲靖市沾益区电子政务网络管理中心云南曲靖655500

光伏组件在实际工程应用中因各种异物遮挡会形成不同阴影遮挡,导致组件输出性能减弱。本文以多晶硅光伏组件为研究对象,采用实验手段探究多模式遮挡效应对实际组件输出电性能的影响。结果表明:单片电池不同遮挡比例对组件输出电压、电... 详细信息

光伏组件在实际工程应用中因各种异物遮挡会形成不同阴影遮挡,导致组件输出性能减弱。本文以多晶硅光伏组件为研究对象,采用实验手段探究多模式遮挡效应对实际组件输出电性能的影响。结果表明:单片电池不同遮挡比例对组件输出电压、电流、功率均有明显影响,遮挡面积越大组件功率下降百分比越大;电池遮挡片数对组件输出电压、电流、功率影响更为显著,当遮挡片数为3片时,三个时间段组件功率下降百分比均已达80%以上;不同遮挡方式对组件输出电流和功率影响较电压大,当采用双列横向遮挡方式时,功率下降百分比达95%以上;不同遮挡位置主要通过影响组件输出电流以影响输出功率,采用对角遮挡时组件功率下降百分比达到80%以上,中午时段尤为明显,接近90%。本文研究结果为多晶硅光伏组件系统应用提供数据支持。

关键词：遮挡效应多模式多晶硅组件输出性能

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Prediction and fusion algorithm for meat moisture content measurement based on loss-on-drying method

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International Journal of Agricultural and Biological engineering 2020年第4期13卷 198-204页

作者： Jing ling Jie Xu Haijun lin Jinyuan lin school of physics and {2.-Electrical engineering Ningxia UniversityYinchuan 750021China Department of Food Science and Technology The Ohio State UniversityColumbusOH43210USA College of Polytechnic Hunan Normal UniversityChangsha 410081China

The loss-on-drying method has been widely used as a standard approach for measuring the moisture content of high-moisture materials such as solid and semi-solid ***-on-drying method provides reliable results,whilst usually labor-intensive and *** paper presents a novel algorithm for predicting the moisture content of meats based on the loss-on drying *** proposed approach developed a drying kinetics model of meats based on Fick’s Second Law and designed a prediction algorithm for meat moisture content using the least-squares *** predicted results were compared with the official method recommended by the Association of Official Analytical Chemists(AOAC).When the moisture content of meat samples(beef and pork)was varied from 69.46%to 74.2.%,the relative error of the meat moisture content(MMC)calculated by the proposed algorithm was 0.0017-0.0117,the absolute errors were less than 1%.The testing time was about 40.18%-56.87%less than the standard detection procedure.

关键词： meat moisture content loss-on-drying method Fick’s Second Law fusion algorithm measurement prediction

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The upper bound function of nonadiabatic dynamics in parametric driving quantum systems

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Chinese physics B 2019年第8期28卷 31-41页

作者： lin Zhang Junpeng Liu school of physics and Information Technology Shaanxi Normal University

The adiabatic control is a powerful technique for many practical applications in quantum state engineering,light-driven chemical reactions and geometrical quantum *** paper reveals a speed limit of nonadiabatic transition in a general time-dependent parametric quantum system that leads to an upper bound function which lays down an optimal criteria for the adiabatic *** upper bound function of transition rate between instantaneous eigenstates of a time-dependent system is determined by the power fluctuations of the system relative to the minimum gap between the instantaneous *** a parametric Hilbert space,the driving power corresponds to the quantum work done by the parametric force multiplying the parametric velocity along the parametric driving *** general two-state time-dependent models are investigated as examples to calculate the bound functions in some general driving schemes with one and two driving *** calculations show that the upper bound function provides a tighter real-time estimation of nonadiabatic transition and is closely dependent on the driving frequencies and the energy gap of the *** deviations of the real phase from Berry phase on different closed paths are induced by the nonadiabatic transitions and can be efficiently controlled by the upper bound *** the upper bound is adiabatically controlled,the Berry phases of the electronic spin exhibit non{2.ear step-like behaviors and it is closely related to topological structures of the complicated parametric paths on Bloch sphere.

关键词： adiabatic dynamics parametric driving upper bound function

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低损耗薄膜铌酸锂光集成器件的研究进展

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人工晶体学报 2024年第3期53卷 372-394页

作者：林锦添高仁宏管江林黎春桃姚妮程亚中国科学院上海光学精密机械研究所强场激光物理国家重点实验室上海201800 华东师范大学物理与电子科学学院上海200241 华东师范大学精密光谱科学与技术国家重点实验室上海200062 之江实验室智能感知研究院杭州311100

近年来得益于薄膜铌酸锂晶圆离子切片技术和低损耗微纳刻蚀工艺的飞速发展,薄膜铌酸锂光集成结构提供了光场紧束缚、快速电光调谐、高效频率转换和声光转换的空前能力,各种高性能的薄膜铌酸锂光集成器件不断涌现,且朝着大规模光集成芯... 详细信息

近年来得益于薄膜铌酸锂晶圆离子切片技术和低损耗微纳刻蚀工艺的飞速发展,薄膜铌酸锂光集成结构提供了光场紧束缚、快速电光调谐、高效频率转换和声光转换的空前能力,各种高性能的薄膜铌酸锂光集成器件不断涌现,且朝着大规模光集成芯片的方向迅猛发展,为高速信息处理、精密测量、量子信息、人工智能等重要应用提供了全新的发展动力。本文主要围绕铌酸锂晶体发展历史、薄膜铌酸锂离子切片技术发展历程、极低损耗微纳刻蚀技术演化进程,以及高性能的薄膜铌酸锂光集成器件进展进行总结,并展望了未来的发展趋势。

关键词：薄膜铌酸锂微纳加工光集成器件非线性光学电光调制器光频梳

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Effects of phosphorus-doping upon the electronic structures of single wall carbon nanotubes

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Science china(physics,Mechanics & Astronomy) 2009年第8期52卷 1139-1145页

作者： CHEN AQing SHAO QingYi lin ZhiCheng school of Telecommunication engineering South China Normal UniversityGuangzhou 510006China

The phosphorus-doped single wall carbon nanotube(PSWCNT) is studied by using First-Principle methods based on Density Function Theory(DFT).The formation energy,total energy,band structure,geometry structure and density of states are *** is found that the formation energy of the P-doped single carbon nanotubes increases with diameters;the total energy of carbon nanotubes with the same diameter decreases as the doping rate *** effects of impurity position on the impurity level are *** illustrates that the position of the impurity level may depend on the C-P-C bond *** to the above results,it is feasible to substitute a carbon atom with a phosphorus atom in *** is also found that P-doped carbon nanotubes are N type semiconductor.

关键词： single wall carbon nanotubes P-doped first-principle calculation formation energy density of state

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Optical properties of NaY（MoO4）2.Eu3+ nanophosphors prepared by molten salt method

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Journal of Rare Earths 2019年第12期37卷 1261-1268页

作者： lin Bai Qingyu Meng Mingxue Huo Yu Sui Department of physics Harbin Institute of TechnologyHarbin 150001China school of physics and {2. engineering Harbin Normal UniversityHarbin 150025China Research Center of Basic Space Science Harbin Institute of TechnologyHarbin 150001China

We synthesized NaY(MoO4)2.Eu3+phosphors of different doping concentrations by a molten salt *** facile way possesses advantages such as simple process,lower calcination temperature(350℃)and small particle size(70 nm).The crystal system is tetragonal phase and crystal lattice is body *** photo luminescence measurements including emission spectra,excitation spectra and fluorescence decay curves were carried out,elucidating that NaY(MoO4)2.Eu3+can be effectively excited by near UV and blue ***,it can be concluded that Eu3+energy transfer type is exchange ***-Rhys factor and the critical energy transfer distance(Rc)were calculated to be 0.043 and 0.995 nm,***’s model was used to obtain the intrinsic radiative transition lifetime of5 D0 level(τ0=0.92. ms).Furthermore,a calculation method was used to calculate refractive index n of nontransparent NaY(MoO4)2.1 mol%Eu3+phosphor,and n was obtained to be 1.86.

关键词： Energy transfer Red phosphors Eu^3+ Molybdates Rare earths

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Micro-nano structured VNb_(9)O_(2.)anode with superior electronic conductivity for high-rate and long-life lithium storage

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Journal of Materials Science & Technology 2021年第24期83卷 66-74页

作者： Mingxing Liang Yongcong Huang Yuda lin Guisheng Liang Cihui Huang Lan Chen Jiaxin Li Qian Feng Chunfu lin Zhigao Huang College of physics and Energy Fujian Normal UniversityFujian Provincial Solar Energy Conversion and Energy Storage Engineering Technology Research CenterFuzhou 350117China Institute of Materials for Energy and Environment School of Materials Science and EngineeringQingdao UniversityQingdao 266071China Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials Fuzhou 350117China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and engineering Fuzhou 350117China

The oxygen vacancies and micro-nano structure can optimize the electron/Li+migration kinetics in anode materials for lithium batteries(LIBs).Here,porous micro-nano structured VNb_(9)O_(2.)composites with rich oxygen vacancies were reasonably prepared via a facile solvothermal method combined with annealing treatment at 800℃for 30 h(VNb_(9)O_(2.)-30 h).This micro-nano structure can enhance the contact of active material/electrolyte,and shorten the Li+diffusion *** introduction of oxygen vacancies can further boosts the intrinsic conductivity of VNb_(9)O_(2.)-30 h for achieving excellent LIB *** as-prepared VNb_(9)O_(2.)-30 h anode showed advanced rate capability with reversible capacity of 12..2.m A h g^(-1)at 4 A g^(-1),and delivered excellent capacity retention of~100%after 2.00 ***,VNb_(9)O_(2.)-30 h provides unexpected long-cycle life(i.e.,reversible capacity of 165.7 m A h g^(-1)at 1 A g^(-1)with a high capacity retention of 85.6%even after 8000 cycles).Additionally,coupled with the Li Fe PO4 cathode,the Li Fe PO4//VNb_(9)O_(2.)-30 h full cell delivers superior LIB properties with high reversible capacities of 91.6 m A h g^(-1)at 5 C for 1000 ***,such reasonable construction method can assist in other high-performance niobium-based oxides in LIBs.

关键词： Lithium-ion batteries VNb_(9)O_(2.)anode Micro-nano structure Oxygen vacancies Electrochemical performance

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In situ construction of zinc-rich polymeric solid–electrolyte interface for high-performance zinc anode

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eScience 2023年第4期3卷 118-126页

作者： Kaixuan Xie Kaixin Ren Qinghong wang Yuxiao lin Fengcan Ma Chuang Sun Yinwei Li Xinsheng Zhao Chao Lai school of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu 221116PR China Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic EngineeringJiangsu Normal UniversityXuzhouJiangsu 221116PR China

With their excellent reliability and environmental friendliness,zinc-ion batteries(ZIBs)are regarded as potential energy storage ***,their poor cycling durability and low Coulombic effectiveness(CE),driven by dendritic growth and surface passivation on the Zn anode,severely restrict their ***,we describe the in situ construction of a Zn-rich polymeric solid–electrolyte interface(SEI)using poly-acrylic acid(PAA)as an electrolyte *** the one hand,the PAA SEI layer offers evenly distributed nucleation sites and promotes ion transport,hence suppressing dendrite *** the other hand,the SEI layer prevents direct contact between the Zn foil and the electrolyte,thus inhibiting side ***,the robust coordination of PAA with Zn^(2.)and the SEI layer's good adherence to the Zn foil provide long-term pro-tection to the Zn *** a result,symmetric cells and Zn/V_(2.O_(5)cells all deliver prolonged cycle life and superior electrochemical efficiency.

关键词： Zn-rich polymeric SEI Electrolyte additive Dendrite growth Chemical corrosion Zinc-ion batteries

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Multiple unpinned Dirac points in group-Va single-layers with phosphorene structure

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npj Computational Materials 2016年第1期2卷 142-148页

作者： Yunhao Lu Di Zhou Guoqing Chang Shan Guan Weiguang Chen Yinzhu Jiang Jianzhong Jiang Xue-sen wang Shengyuan A Yang Yuan Ping Feng Yoshiyuki Kawazoe Hsin lin school of Materials Science and engineering Zhejiang UniversityHangzhouChina State Key Laboratory of Silicon Materials Zhejiang UniversityHangzhouChina Centre for Advanced 2. Materials and Graphene Research Centre National University of SingaporeSingaporeSingapore Department of physics National University of SingaporeSingaporeSingapore Research Laboratory for Quantum Materials Singapore University of Technology and DesignSingaporeSingapore College of physics and electronic {2. Zhengzhou Normal UniversityZhengzhouChina New Industry Creation Hatchery Center Tohuku UniversitySendaiJapan Institute of Thermophysics Siberian Branch of Russian Academy of SciencesNovosibirskRussia

Emergent Dirac fermion states underlie many intriguing properties of graphene,and the search for them constitutes one strong motivation to explore two-dimensional(2.)allotropes of other ***,the ultrathin layers of black phosphorous,has been a subject of intense investigations recently,and it was found that other group-Va elements could also form 2. layers with similar puckered lattice ***,by a close examination of their electronic band structure evolution,we discover two types of Dirac fermion states emerging in the low-energy *** pair of(type-I)Dirac points is sitting on high-symmetry lines,while two pairs of(type-II)Dirac points are located at generic k-points,with different anisotropic dispersions determined by the reduced symmetries at their *** fully-unpinned(type-II)2. Dirac points are discovered for the first *** the absence of spin-orbit coupling(SOC),we find that each Dirac node is protected by the sublattice symmetry from gap opening,which is in turn ensured by any one of three point group *** SOC generally gaps the Dirac nodes,and for the type-I case,this drives the system into a quantum spin Hall insulator *** suggest possible ways to realise the unpinned Dirac points in strained phosphorene.

关键词： structure spectrum Dirac

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