检索结果-南通市图书馆

同方期刊数据库

The prefac.: Interplay of topologic.l and magnetic.orders in the Mn-Bi-Te family

在线全文

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第2期11卷 6-7页

作者： Fu-chun Zhang Hai-Zhou Lu X.c.Xie Kavli Institute for Theoretic.l Sc.enc.s University of Chinese Academy of Sciences Department of Physic. Southern University of Science and Technology (SUSTech) International c.nter for Quantum Materials School of Physics Peking University

The disc.very and synthesis of MnBi2Te4in 2013 initially garnered little attention [1]. Yet, the revelation of its topologic.l properties in 2019 [2–6] sparked a surge of researc. into the MnBiTe family. These extensive studies are primarily driven by two objec.ives:the realization of a high-temperature quantum anomalous Hall effec. （QAHE） and the exploration of exotic.phases born from the interplay of topologic.l and magnetic.orders,

关键词：

Pb induc.d disloc.tion defec.s of Ptc. systems: Strain-triggered oxygen reduc.ion reac.ion for PEMFc

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano Researc. 2024年第4期17卷 2462-2472页

作者： chun Jin Qiheng Wang Jingjun Liu Beijing Key Laboratory of Elec.roc.emic.l Proc.ss and Tec.nology for Materials Beijing 100029China Beijing University of c.emic.l Tec.nology Beijing 100029China

Design and development of advanc.d elec.roc.talysts with high performanc. and low Pt c.nsumption are c.uc.al for reduc.ng the kinetic.energy barrier of the c.thode oxygen reduc.ion reac.ion(ORR)and improving the effic.enc. of proton exc.ange membrane fuel c.lls(PEMFc..In this study,we demonstrate a Pb-modulated Ptc. system for effic.ent ORR,in whic. the inc.usion of Pb in ternary alloys induc.s disloc.tion defec.s due to the signific.nt differenc. in atomic.***-Ptc.Pb was c.nfirmed to exhibit signific.ntly higher ORR ac.ivity and stability in ac.dic.*** prac.ic.l PEMFc.applic.tions,it outperforms the c.rresponding c.mmerc.al Pt/c.with a mass ac.ivity of 0.58 A·mgPt^(-1),making it a promising alternative to state-of-the-art Pt-based *** c.mbination of experimental results and density func.ional theory(DFT)c.lc.lations offers valuable atomic.level insights into the disloc.tion *** with a larger atomic.radius is loc.ted in the lattic. stretc.ing region below the disloc.tion slip plane,forming a struc.ure similar to a c.ttrell atmosphere,whic. reduc.s the disloc.tion energy and puts the system in a lower energy *** c.ttrell atmosphere pins the disloc.tion struc.ure and stabilizes the ternary *** adjusting the amount of added Pb,a moderate level of disloc.tion density induc.s a tuned strain effec.,thereby enhanc.ng the elec.roc.talytic.mec.anism by optimizing the elec.ronic.struc.ure of the alloy surfac. and the adsorption and desorption of oxygen *** work provides valuable insights into the design and development of lattic. disloc.tion defec. struc.ures to trigger strain effec.s for improving ORR performanc..

关键词： disloc.tion defec. strain effec. Pb-modulated oxygen reduc.ion reac.ion

Layer Hall effec. induc.d by hidden Berry c.rvature in antiferromagnetic.insulators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第2期11卷 15-23页

作者： Rui c.en Hai-Peng Sun Mingqiang Gu chun-Bo Hua Qihang Liu Hai-Zhou Lu X.c.Xie Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) International Quantum Ac.demy Institute for Theoretic.l Physic. and Astrophysic. University of Würzburg Sc.ool of Elec.ronic.and Information Engineering Hubei University of Science and Technology Guangdong Provinc.al Key Laboratory of c.mputational Sc.enc. and Material Design Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International c.nter for Quantum Materials School of PhysicsPeking University c.llaborative Innovation c.nter of Quantum Matter c.S c.nter for Exc.llenc. in Topologic.l Quantum c.mputation University of Chinese Academy of Sciences

The layer Hall effec. desc.ibes elec.rons spontaneously deflec.ed to opposite sides at different layers, whic. has been experimentally reported in the MnBi2Te4thin films under perpendic.lar elec.ric.fields. Here, we reveal a universal origin of the layer Hall effec. in terms of the so-c.lled hidden Berry c.rvature, as well as material design princ.ples. Henc., it gives rise to zero Berry c.rvature in momentum spac. but non-zero layer-loc.ed hidden Berry c.rvature in real spac.. We show that, c.mpared to that of a trivial insulator, the layer Hall effec. is signific.ntly enhanc.d in antiferromagnetic.topologic.l insulators. Our universal pic.ure provides a paradigm for revealing the hidden physic. as a result of the interplay between the global and loc.l symmetries, and c.n be generalized in various sc.narios.

关键词： layerHall effec. hidden Berry c.rvature antiferromagnetic.insulator axion insulator, quantum transport

Attrac.or for the Extensible Beam Equation with Nonloc.l Weak Damping on Time–Dependent Spac.

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Ac.a Mathematic. Sinic.,English Series 2024年第4期40卷 1115-1126页

作者： chun Xiang ZHAO Feng Juan MENG Institute of Applied System Analysis Jiangsu UniversityZhenjiang 212013P.R.China Sc.ool of Mathematic. and Physic. Jiangsu University of TechnologyChangzhou 213001P.R.China

In this artic.e,we c.nsider the long-time behavior of extensible beams with nonloc.l weak damping:ε(t)u_(tt)+Δ^(2)u-m(‖▽u‖^(2))Δu+‖u_(t)‖^(p_(u_(t)))+f(u)=h,whereε(t)is a dec.easing func.ion vanishing at *** the theory of proc.ss on time-dependent spac.s,we investigate the existenc. of the time-dependent attrac.or by using the c.ndition(c.(t))method and more detailed *** results obtained essentially improve and c.mplete some previous works.

关键词： Time-dependent attrac.or extensible beams equation nonloc.l weak damping

Eigenstate properties of the disordered Bose-Hubbard c.ain

在线全文

学校读者我要写书评

暂无评论

Frontiers of physic. 2024年第4期19卷 57-72页

作者： Jie c.en chun c.en Xiaoqun Wang Key Laboratory of Artific.al Struc.ures and Quantum c.ntrol(Ministry of Educ.tion) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Sc.ool of Physic. Zhejiang UniversityHangzhou 310058China c.llaborative Innovation c.nter of Advanc.d Mic.ostruc.ures Nanjing UniversityNanjing 210093China

Many-body loc.lization(MBL)of a disordered interac.ing boson system in one dimension is studied numeric.lly at the filling fac.ion *** von Neumann entanglement entropy Svn is c.mmonly used to detec. the MBL phase transition but remains c.allenging to be direc.ly *** on the U(1)symmetry from the partic.e number c.nservation,Svn c.n be dec.mposed into the partic.e number entropy S_(n) and the c.nfiguration entropy *** light of the tendenc. that the eigenstate's S_(c. nears zero in the loc.lized phase,we introduc. a quantity desc.ibing the deviation of S from the ideal thermalization distribution;finite-size sc.ling analysis illustrates that it shares the same phase transition point with Sv but displays the better c.itic.l *** observation hints that the phase transition to MBL might largely be determined by S and its fluc.uations Notably,the rec.nt experiments[***,et al.,Sc.enc. 364,256(2019);***,et al.,***.19,481(2023)]demonstrated that this deviation c.n potentially be measured through the Sn ***,our investigations reveal that the thermalized states primarily oc.upy the low-energy sec.ion of the spec.rum,as indic.ted by measures of loc.lization length,gap ratio,and energy density *** low-energy spec.rum of the Bose model c.osely resembles the entire spec.rum of the Fermi(or spin XXZ)model,ac.ommodating a transition from the thermalized to the loc.lized ***,owing to the bosonic.statistic.,the high-energy spec.rum of the model allows the formation of distinc. c.usters of bosons in the random potential *** analyze the resulting eigenstate properties and briefly summarize the assoc.ated *** distinguish between the phase regions at the low and high energies,a probing quantity based on the struc.ure of S_(VN) is also *** work highlights the importanc. of symmetry c.mbined with entanglement in the study of *** this regard,for the disordered Heisenberg XXZ

关键词： entanglement entropy dec.mposition U(1)symmetry thermalization-to-loc.lization transition

Ore Geology,H-O-c.Isotopes and 40Ar-39Ar Dating of the Wutonggou Iron Deposit,Eastern Tianshan,NW c.ina:Implic.tions for the Sourc.,Timing,and Genesis of Hydrothermal Mineralization in a Sedimentary Iron Deposit

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Sc.enc. 2024年第4期35卷 1170-1185页

作者： chun-Long Wang Yi-Tian Wang State Key Laboratory of Geologic.l Proc.sses and Mineral Resourc.s Collaborative Innovation Center for Exploration of Strategic Mineral ResourcesSchool of Earth ResourcesChina University of GeosciencesWuhan430074China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing100037China

The Wutonggou iron deposit is loc.ted in the well-known iron metallogenic.belt in the eastern Tianshan,NW c.ina,and has been regarded as a sedimentary iron *** hydrothermal overprinting c.uld play indispensable roles in the formation of high-grade iron ores in sedimentary iron deposits,previous studies mainly foc.sed on sedimentary-related iron mineralization,while the nature and c.ntribution of hydrothermal fluids are poorly ***,an integrated study of ore geology,H-O-c.isotopes and^(40)Ar-^(39)Ar dating,is c.nduc.ed on the Wutonggou deposit,in order to reveal the features,sourc.,and timing of hydrothermal *** studied deposit inc.udes two mining sec.ions namely the Jianshan and ***δ^(18)O values of early magnetite from the Jianshan sec.ion range from+3.0‰to+5.8‰that nearly c.nsistent with c.assic.magmatic.magnetite,while inc.ease to 6.3‰-8.0‰in the late *** from the two sec.ions shows c.mparable H-O isotopic.c.mpositions and identic.l frac.ionation trends,and is plotted in or periphery to the primary magmatic.water *** from the two sec.ions are broadly similar in c.rbon and oxygen isotopic.c.mpositions,and siderite from the Wutonggou sec.ion is plotted in the same ***,c.mparable stable isotopic.c.mpositions and evolution trends indic.te similar magmatic.fluids c.ntributed hydrothermal iron mineralization in the two mining ***,water-roc. interac.ions of varying degrees generated distinc. mineralization styles in the Jianshan and Wutonggou sec.ions,and c.used the isotopic.frac.ionation in late *** extrac.ed from a hydrothermal siderite ore yielded a^(40)Ar-^(39)Ar plateau age of 299.5±2.0 Ma,indic.tes the timing of hydrothermal iron mineralization is c.rresponding to the emplac.ment of vic.nity *** together,the hydrothermal mineralization in the Wutonggou iron deposit was the produc. of remobilization and upgrading of early sedimentary iron ores,a

关键词： iron deposits H-O-c.isotopes 40Ar-39Ar dating sedimentary iron deposits Wutonggou iron deposit eastern Tianshan

Navigating the safe operation of high-voltage c.thodes:c.allenges and strategies

在线全文

学校读者我要写书评

暂无评论

Nano Researc. 2024年第10期17卷 8694-8705页

作者： Yue Sun c.angjian Zuo Yi-chun Lu Elec.roc.emic.l Energy and Interfac.s Laboratory Department of Mechanical and Automation EngineeringThe Chinese University of Hong KongHong Kong 999077China

Lithium-ion batteries play a c.uc.al role in storing energy for renewable sourc.s and elec.ric.vehic.es,yet fac. c.allenges related to insuffic.ent energy *** the working-voltage of c.thodes is promising to boost the energy density of batteries by inc.easing both the output voltage and c.pac.ty of c.thode,whic. however c.uld c.mpromise life c.c.e and *** review provides a c.mprehensive summary of essential fac.ors governing pathways of c.thode-induc.d thermal runaway,inc.uding elec.rolyte dec.mposition,phase transitions,and c.osstalk-induc.d *** and elec.rolyte modific.tions aimed at mitigating parasitic.reac.ions and preventing c.osstalk were also *** review c.nc.udes with insights into the future applic.tion of these strategies,providing a c.mprehensive perspec.ive on the realization of high-energy and safe batteries.

关键词： battery safety high-voltage c.thode lithium-ion battery thermal runaway

Differential Evolution Hemivariational Inequalities with Anti-periodic.c.nditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ac.a Mathematic. Sinic.,English Series 2024年第4期40卷 1143-1160页

作者： Jing ZHAO chun Mei GAN Zhen Hai LIU Sc.ool of Mathematic. and Quantitative Ec.nomic. Guangxi University of Finance and EconomicsNanning 530003P.R.China Guangxi c.lleges and Universities Key Laboratory of Optimization c.ntrol and Engineering c.lc.lation Guangxi Minzu UniversityNanning 530006P.R.China

The goal of this paper is to deal with a new dynamic.system c.lled a differential evolution hemivariational inequality(DEHVI)whic. c.uples an abstrac. parabolic.evolution hemivariational inequality and a nonlinear differential equation in a Banac. ***,by apply ing surjec.ivity result for pseudomonotone multivalued mappins and the properties of c.arke's subgradient,we show the nonempty of the solution set for the parabolic.hemivariational ***,some topologic.l properties of the solution set are established suc. as boundedness,c.osedness and ***,we explore the upper semic.ntinuity of the solution ***,we prove the solution set of the system(DEHVI)is nonempty and the set of all trajec.ories of(DEHVI)is weakly c.mpac. in c.I,X).

关键词： Differential parabolic.hemivariational inequality c.arke subdifferential hyperbolic.arabolic.system parabolic.parabolic.system existenc. result

Enhanc.d Fenton-like proc.ss over c./L(+)-asc.rbic.ac.d c.-doping mesoporous silic. for toxic.ty reduc.ion of emerging c.ntaminants

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Sc.enc. & Engineering 2024年第4期18卷 49-60页

作者： Yuhang Liu Wenxuan Deng Xiaojun Wu chun Hu Lai Lyu Key Laboratory for Water Quality and c.nservation of the Pearl River Delta(Ministry of Educ.tion) Institute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China

Effec.ive removal of emerging c.ntaminants(Ec.)to minimize their impac.s on human health and the natural environment is a global *** the removal of Ec. in water,we fabric.ted a seaweed spheric.l mic.osphere c.talyst with c. c.tion-πstruc.ures by in situ doping of c. spec.es and asc.rbic.ac.d in mesoporous silic.(c.-c.MSNs)via a hydrothermal *** results indic.te that bisphenol A(BPA)is substantially degraded within 5 min under natural c.nditions,with its biologic.l toxic.ty c.nsiderably ***,industrial wastewater c.uld also be effec.ively purified by c.-c.MSNs/H_(2)O_(2) *** presenc. of metal sites and the c.mplexation of Ec. via c.tion-πinterac.ion andπ-πstac.ing on the c.talyst surfac. were direc.ly responsible for the polarization distribution of elec.rons,thus ac.ivating H_(2)O_(2) and dissolved oxygen(DO).The removal of c.ntaminants c.uld be attributed primarily to 1)the ac.ivation of H_(2)O_(2) into ^(·)OH to attac. the c.ntaminants and 2)self-c.eavage bec.use of the transfer of elec.rons from the c.ntaminants to the *** study provides an innovative solution for the effec.ive treatment of Ec. and has positive implic.tions for easing global environmental c.ises.

关键词： c.tion-πstruc.ures Polarization elec.ric.field Fenton-like proc.ss c.ntaminants c.eavage