检索结果-南通市图书馆

Chinese Physics Letters 2024年第4期41卷 110-117页

作者：赵金瑜蔡树陈逸雯顾根大闫宏涛郭静韩金宇王鹏玉周亚洲李延春李晓东任治安吴奇周兴江丁阳向涛毛河光孙力玲 Institute of Physics Chinese Academy of SciencesBeijing 100190China Center for High Pressure Science&Technology Advanced Research Beijing 100094China Condensed Matter Physics&Materials Science Department Brookhaven National LaboratoryNY 11973-5000USA University of Chinese Academy of Sciences Beijing 100190China Institute of High Energy Physics Chinese Academy of ScienceBeijing 100049China Beijing Academy of Quantum Information Sciences Beijing 100193China

What factors fundamentally determine the value of superconducting transition temperature Tc in high temperature superconductors has been the subject of intense *** the establishment of an empirical law known as Homes'law,there is a growing consensus in the community that the Tc value of the cuprate superconductors is closely linked to the superfluid density(ρ_(s))of its ground state and the conductivity(σ)of its normal ***,all the data supporting this empirical law(ρ_(s)=AσT_(c))have been obtained from the ambientpressure *** this study,we present the first high-pressure results about the connection of the quantities of ρ_(s) and σ with T_(c),through the studies on the Bi_(1.74)Pb_(0.38)Sr_(1.88)CuO_(6+δ)and Bi_(2)Sr_(2)CaCu_(2)O_(8+δ),in which the value of their high-pressure resistivity(ρ=1/σ)is achieved by adopting our newly established method,while the quantity ofρs is extracted using Homes'*** highlight that the Tc values are strongly linked to the joint response factors of magnetic field and electric field,i.e.,ρ_(s) and σ,respectively,implying that the physics determining T_(c) is governed by the intrinsic electromagnetic fields of the system.

关键词： superconductors Transition Conductivity

Superconductivity in a New(Sr,Y)CuO_(2) System Synthesized Under High Pressure

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1994年第2期11卷 123-126页

作者： zhou xingjiang YAO Yushu DONG Cheng LI Jingwei JIA Shunlian ZHAO Zhongxian National Laboratory for Superconductivity Institute of PhysicsAcademia SinicaBeijing 100080

Superconductivity has been observed in a new series(Sr_(1-x)Y_(x))CuO_(2)(x=0.00-0.30) synthesized under high pressure of 3.5GPa and 950℃.Compared with the previous(Sr_(1-x)Y_(x))CuO_(2)(Ln=Nd,Pr and La)series,this new series shows a broader superconducting composition range of x=*** onset transition temperature of this series is 36-38K.

关键词： x=0 K.

Visualizing the charge order and topological defects in an overdoped （Bi,Pb）2Sr2CuO6+x superconductor

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 117-123页

作者： Ying Fei Yuan Zheng KunLiang Bu WenHao Zhang Ying Ding xingjiang zhou Yi Yin Department of Physics Zhejiang UniversityHangzhou 310027China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100871China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Electronic charge order is a symmetry breaking state in high-Tc cuprate superconductors. In scanning tunneling microscopy, the detected charge-order-induced modulation is an electronic response of the charge order. For an overdoped(Bi,Pb)2Sr2CuO6+x sample, we apply scanning tunneling microscopy to explore local properties of the charge order. The ordering wavevector is nondispersive with energy, which can be confirmed and determined. By extracting its order-parameter field, we identify dislocations in the stripe structure of the electronic modulation, which correspond to topological defects with an integer winding number of ±1. Through differential conductance maps over a series of reduced energies, the development of different response of the charge order is observed and a spatial evolution of topological defects is detected. The intensity of charge-order-induced modulation increases with energy and reaches its maximum when approaching the pseudogap energy. In this evolution, the topological defects decrease in density and migrate in space. Furthermore, we observe appearance and disappearance of closely spaced pairs of defects as energy changes. Our experimental results could inspire further studies of the charge order in both high-Tccuprate superconductors and other charge density wave materials.

关键词： cuprate superconductors scanning tunneling microscopy charge order topological defects

Electronic effect of doped oxygen atoms in Bi2201 superconductors determined by scanning tunneling microscopy

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2018年第12期61卷 30-36页

作者： Ying Fei KunLiang Bu WenHao Zhang Yuan Zheng Xuan Sun Ying Ding xingjiang zhou Yi Yin Department of Physics Zhejiang UniversityHangzhou 310027China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100871China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

Oxygen dopants are essential for tuning the electronic properties of the cuprate superconductors Bi_2Sr_2Ca_(n-1)Cu_nO_(2n+4+δ).Here,we study an optimally doped Bi_2Sr_(2-x)La_xCuO_(6+δ)and an overdoped Bi_(2-y)Pb_ySr_2CuO_(6+δ)by scanning tunneling microscopy and spectroscopy(STM/STS).Based on the characteristic features of local STS,three forms of oxygen dopants are identified:interstitial oxygen atoms on the SrO layers,oxygen vacancies on the SrO layers,and interstitial oxygen atoms on the BiO *** both samples,the first form dominates the number of oxygen *** the extracted spatial distribution of the oxygen dopants,we calculate the dopant concentrations and estimate the average hole carrier *** magnitudes of the electronic pseudogap state in both samples are inhomogeneously distributed in *** statistical analysis on the spatial distributions of the oxygen dopants and the pseudogap magnitude demonstrates that the doped oxygen atoms on the SrO layers tend to suppress the nearby pseudogap magnitude.

关键词： cuprate superconductor scanning tunneling spectroscopy doping hole concentration pseudogap

A New Form of Interaction-Induced Dirac Cones Discoveredin Silicene/Ag(111) System

在线全文

学校读者我要写书评

暂无评论

Bulletin of the Chinese Academy of Sciences 2017年第1期31卷 37-38页

作者： zhou xingjiang Institute of Physics Chinese Academy of Sciences

Silicene,analogous to graphene,is a one-atomthick two-dimensional crystal of silicon which is expected to share many of the remarkable properties of *** buckled honeycomb structure of silicene,along with its enhanced spin-orbit coupling,endows silicene with considerable advantages over graphene in that the spin-split states in silicene are tunable with external *** the

关键词：英语阅读理解科技

Spectroscopic Evidence for an Additional Symmetry Breaking in the Nematic State of FeSe Superconductor

在线全文

学校读者我要写书评

暂无评论

Bulletin of the Chinese Academy of Sciences 2020年第3期34卷 176-178页

作者： zhou xingjiang Institute of Physics CAS

In iron-based superconductors,FeSe has the simplest crystal structure which consists solely of the basic building block,the FeSe layers,that dictates the *** undergoes a structural phase transition at around 90 K to enter a nematic state but without a long-range magnetic ***,FeSe is an ideal system to investigate the nematicity and superconducting mechanism in iron-based superconductors,It represents a unique system that superconductivity and nematicity coexist in the superconducting stale,giving rise to its distinct electronic structure and superconducting gap structure.

关键词： structure. order. superconductivity

Direct bandgap engineering with local biaxial strain in few-layer MoS2 bubbles

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第8期13卷 2072-2078页

作者： Yang Guo Bin Li Yuan Huang Shuo Du Chi Sun Hailan Luo Baoli Liu xingjiang zhou Jinlong Yang Junjie Li Changzhi Gu Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing100190China School of Physical Sciences CAS Key Laboratory of Vacuum PhysicsUniversity of Chinese Academy of SciencesBeijing100190China Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information&Quantum Physics(CAS) University of Science and Technology of ChinaHefei230026China Songshan Lake Materials Laboratory Dongguan523808China

Nano Research volume 13,pages2072–2078(2020)Cite this article 211 Accesses Metrics details Abstract Strain engineering provides an important strategy to modulate the optical and electrical properties of semiconductors for improving devices performance with mechanical force or thermal expansion ***,we present the investigation of the local strain distribution over few-layer MoS2 bubbles,by using scanning photoluminescence and Raman *** observe the obvious direct bandgap emissions with strain in the few-layer MoS2 bubble and the strain-induced continuous energy shifts of both resonant excitons and vibrational modes from the edge of the MoS2 bubble to the center(10μm scale),associated with the oscillations resulted from the optical interference-induced temperature *** understand these results,we perform ab initio simulations to calculate the electronic and vibrational properties of few-layer MoS2 with biaxial tensile strain,based on density functional theory,finding good agreement with the experimental *** study suggests that local strain offers a convenient way to continuously tune the physical properties of a few-layer transition metal dichalcogenides(TMDs)semiconductor,and opens up new possibilities for band engineering within the 2D plane.

关键词： two-dimensional(2D)layered materials transition metal dichalcogenides band engineering local strain

Micro-nano-fabrication of green functional materials by multiphase microfluidics for environmental and energy applications

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第8期9卷 1199-1219页

作者： Cheng Qi Tao zhou xingjiang Wu Kailang Liu Lei Li zhou Liu Zhuo Chen Jianhong Xu Tiantian Kong Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control EngineeringShenzhen University The State Key Laboratory of Chemical Engineering Department of Chemical EngineeringTsinghua University College of Chemistry and Environmental Engineering Shenzhen University Department of Biomedical Engineering School of MedicineShenzhen University

Multiphase microfluidic has emerged as a powerful platform to produce novel materials with tailor-designed functionalities, as microfluidic fabrication provides precise controls over the size, component, and structure of resultant materials. Recently, functional materials with welldefined micro-/nanostructures fabricated by microfluidics find important applications as environmental and energy materials. This review first illustrated in detail how different structures or shapes of droplet and jet templates are formed by typical configurations of microfluidic channel networks and multiphase flow systems. Subsequently, recent progresses on several representative energy and environmental applications, such as water purification, water collecting and energy storage, were overviewed. Finally, it is envisioned that integrating microfluidics and other novel materials will play increasing important role in contributing environmental remediation and energy storage in near future.

关键词： Microfluidics Multi-phase flow Droplet and microfiber Environmental remediation Energy Storage

Relationship between the parent charge transfer gap and maximum transition temperature in cuprates

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2016年第23期61卷 1826-1832页

作者： Wei Ruan Cheng Hu Jianfa Zhao Peng Cai Yingying Peng Cun Ye Runze Yu Xintong Li Zhenqi Hao Changqing Jin xingjiang zhou Zheng-Yu Weng Yayu Wang State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing 100084China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Collaborative Innovation Center of Quantum Matter Beijing 100084 China Institute for Advanced Study Tsinghua UniversityBeijing 100084 China

One of the biggest puzzles concerning the cup- rate high temperature superconductors is what determines the maximum transition temperature （Tc,max）, which varies from less than 30 to above 130 K in different compounds. Despite this dramatic variation, a robust trend is that within each family, the double-layer compound always has higher Tc,max than the single-layer counterpart. Here we use scanning tunneling microscopy to investigate the electronic structure of four cuprate parent compounds belonging to two different families. We find that within each family, the double layer compound has a much smaller charge transfer gap size （ACT）, indicating a clear anticorrelation between AcT and Tc,max. These results suggest that the charge transfer gap plays a key role in the superconducting physics of cuprates, which shed important new light on the high To mechanism from doped Mott insulator perspective.

关键词： Cuprates Mot insulator Charge transfer gap - Maximum transition temperature Scanning tunneling microscopy

Raman spectra evidence for the covalent-like quasi-bonding between exfoliated MoS2 and Au films

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2021年第4期64卷 157-165页

作者： Xinyu HUANG Lei ZHANG Liwei LIU Yang QIN Qiang FU Qiong WU Rong YANG Jun-Peng LV Zhenhua NI Lei LIU Wei JI Yeliang WANG xingjiang zhou Yuan HUANG Institute of Physics Chinese Academy of Sciences Department of Materials Science and Engineering College of Engineering Peking University College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsMinistry of Education of China Beijing University of Technology School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of Technology Songshan Lake Materials Laboratory School of Science Beijing University of Posts and Telecommunications School of Physics Southeast University Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Renmin University of China

Gold-enhanced mechanical exfoliation method attracts broad interests in recent years, which has been widely used for preparing large-area and high-quality 2D single crystals. Even many calculations predict that there is strong interaction between Au film and the exfoliated 2D crystals, direct experimental evidence is still lacking. Here, we perform Raman spectroscopy measurements for few layer MoSwith and without Au film underneath. The main peaks of MoSon Au film show no obvious change at higher frequency,however, the breathing and shear modes at low-frequency are suppressed, especially for breathing *** contrast, both breathing modes and shear modes can be detected on suspended MoSand the samples are transferred from Au film to SiO/Si. These comparison results provide direct evidence for the existence of covalent-like quasi-bonding at the interface of Au film and the exfoliated MoScrystal. This MoS/Au interface interaction presents a special pinning-effect for low-frequency rigid vibration. Similar pinning-effect is also discovered in WS/Au system. Our work reports the suppression of low-frequency Raman modes of MoS, WSon Au film, which will deliver new inspiration for studying other interactions between layered materials and solid surfaces.

关键词： MoS$_{2}$ Raman spectroscopy gold-enhanced mechanical exfoliation low-frequency raman modes covalent-like quasi-bonding