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Erratum: "A structural modeling approach to solid solutions based on the similar atomic environment" [J. Chem. Phys. 153, 034101 (2020)]

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The Journal of chemical physics 2020年第8期153卷 089901页

作者： Fuyang Tian De-Ye Lin Xingyu Gao Ya-Fan Zhao Hai-Feng Song Institute for Applied Physics Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science University of Science and Technology Beijing Beijing 100083 China. CAEP Software Center for High Performance Numerical Simulation Beijing 100088 China. Institute of Applied Physics and Computational Mathematics Beijing 100088 China.

Due to a misunderstanding at the proof stage, the authors’ contribution was not stated clearly in the original paper.1 Additionally, the information on the co-c

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Chemical short-range ordering and its strengthening effect in refractory high-entropy alloys

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Physical Review B 2021年第10期103卷 104107-104107页

作者： S. D. Wang X. J. Liu Z. F. Lei D. Y. Lin F. G. Bian C. M. Yang M. Y. Jiao Q. Du H. Wang Y. Wu S. H. Jiang Z. P. Lu Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 People's Republic of China Software Center for High Performance Numerical Simulation Chinese Academy of Engineering Physics Beijing 100088 People's Republic of China Institute of Applied Physics and Computational Mathematics Beijing 100088 People's Republic of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201204 People's Republic of China

In this work, we perform first-principles calculations, coupled with synchrotron small-angle x-ray scattering (SAXS) to investigate electronic origins of the chemical short-range ordering (CSRO) and to reveal the relationship between CSROs and mechanical properties in a typical bcc (body-centered-cubic) TiZrHfNb high-entropy alloys (HEAs). It was found that existence of an appropriate degree of CSROs not only stabilizes the HEA lattice structure, but also enhances the hardness, elastic modulus, and ideal strength. Comprehensive electronic structure analyses uncover that the reduction of d electrons at the Fermi level due to the development of (Ti, Zr)-based CSROs stabilizes the bcc HEA, and the CSRO-induced strengthening is attributed to the local lattice distortion and the d-electron transfer from high-energy to low-energy states under applied strains. This finding not only gives insight into understanding the nature of CSRO strengthening in bcc HEAs, but also provides a paradigm for achieving desired mechanical properties via tailoring CSROs in HEAs.

关键词： Density of states Elasticity Electronic structure First-principles calculations Structural properties Transition metal alloys Density functional theory Small-angle x-ray scattering

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Anisotropic and mutable magnetization in Kondo lattice CeSb2

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Chinese Physics B 2017年第6期26卷 319-323页

作者：张云朱燮刚胡丙锋谭世勇谢东华冯卫刘琴张文刘瑜宋海峰罗丽珠张政军赖新春 Science and Technology on Surface Physics and Chemistry Laboratory Department of Engineering Physics Tsinghua University Key Laboratory of Neutron Physics Institute of Nuclear Physics and ChemistryChina Academy of Engineering Physics Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Software Center for High Performance Numerical Simulation China Academy of Engineering Physics Key Laboratory of Advanced Materials (MOE) School of Materials Science and EngineeringTsinghua University

We have systematically studied the behaviors of the resistivity and magnetization of CeSb2 single crystals as a function of temperature and external field. Four anomalies in the resistivity/magnetization-versus-temperature curves are observed at low magnetic field. They are located at 15.5 K, 11.5 K, 9.5 K, and 6.5 K, corresponding to the paramagnetic–magnetically ordered state（MO）, MO-antiferromagnetic（AFM）, AFM–AFM, and AFM–ferromagnetic（FM） transitions, *** anomaly at 9.5 K is only visible with H‖[010] by magnetic susceptibility measurements, indicating that the AFM–AFM transition only happens along [010] direction in ab-plane. The four magnetic transitions are strongly suppressed by high external field. Finally, the field-temperature phase diagrams of CeSb2 with different orientations of the applied field in ab-plane are constructed and indicate the highly anisotropic nature of the magnetization of CeSb2.

关键词： CeSb2 electronic properties magnetic properties

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医用增材制造——从前沿技术到产品研发

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Engineering 2020年第11期6卷 31-41页

作者：邱贵兴丁文江田伟秦岭赵宇张联盟吕坚陈代杰袁广银吴成铁卢秉恒杜如虚陈继明 Mo Elbestawi 顾忠伟李涤尘孙伟赵远锦赫捷金大地刘斌张凯李鉴墨 Kam W.Leong 赵德伟郝定均敖英芳邓旭亮杨惠林徐少克陈英奇李龙樊建平聂国辉陈芸曾晖陈玮赖毓霄 Department of Orthopedics Peking Union Medical College Hospital Chinese Academy of Medical Science & Peking Union Medical College National Engineering Research Center of Light Alloys Net Forming & State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong University National Engineering Research Center of Mg Materials and Applications and School of Materials Science & Engineering Shanghai Jiao Tong University Department of Spine Surgery Beijing Jishuitan Hospital Center for Translational Medicine Research and Development Institute of Biomedical and Health Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Guangdong Engineering Laboratory of Biomaterials Additive Manufacturing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Center for Advanced Structural Materials City University of Hong Kong Shenzhen Research Institute Hong Kong Branch of National Precious Metals Material Engineering Research Center Department of Material Science and Engineering City University of Hong Kong Department of Mechanical Engineering City University of Hong Kong School of Pharmacy Shanghai Jiao Tong University China State Institute of Pharmaceutical Industry Shanghai Institute of Pharmaceutical Industry State Key Laboratory of High-Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of Sciences Micro- and Nano-Technology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Shien-Ming Wu School of Intelligent Engineering Guangzhou International Campus South China University of Technology Beijing Engineering Research Center of 3D Printing for Digital Medical Health Beijing University of Technology Beijing Engineering Research Center of Laser Technology Beijing University of Technology Key Laboratory of Trans-Scale Las

1.医用增材制造原料的研发和挑战医用增材制造的原料与其他多个领域使用的原料具有广泛通用性,这是构成三维(3D)打印领域的重要基础。这些领域的增材制造在材料类型、粉体特性、成型性和黏弹性等方面面临着相同的问题和挑战。例如,航空...

1.医用增材制造原料的研发和挑战医用增材制造的原料与其他多个领域使用的原料具有广泛通用性,这是构成三维(3D)打印领域的重要基础。这些领域的增材制造在材料类型、粉体特性、成型性和黏弹性等方面面临着相同的问题和挑战。例如,航空领域采用了多种金属材料,而生物医学领域会使用金属、聚合物和无机材料。在生物医学领域,

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Near-field optical characteristics of Ag nanoparticle within the near-field scope of a metallic AFM tip irradiated by SNOM laser

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Integrated Ferroelectrics 2017年第1期178卷 117-124页

作者： Cui, Jianlei Zhang, Jianwei Wang, Xuewen Barayavuga, Theogene He, Xiaoqiao Mei, Xuesong Wang, Wenjun Jiang, Gedong Wang, Kedian State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan China State Key Laboratory of High Performance Complex Manufacturing Central South University Changsha China Department of Architecture and Civil Engineering City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong Center for Advanced Structural Materials City University of Hong Kong Shenzhen Research Institute Shenzhen Hong Kong

Based on the near-field optical theory, the near-field characteristics of Ag nanoparticle within the near-field scope of a metallic AFM tip irradiated by optical fiber probe laser are carried out with finite element method. As the laser transmits in optical fiber probe, the light of the various modes is gradually turned off, remaining the HE11 mode laser. Meanwhile, the evanescent field can be produced at the confined aperture, which will also stimulate the near-field enhancement phenomenon of metallic AFM tip and Ag nanoparticle with those extrema appearing in the apex of AFM tip, the upper and lower parts of Ag nanoparticle, and the upper and lower sharp boundary positions at the end of the tapered fiber probe. The related mechanism is revealed and near-field optical characteristics are also analyzed. © 2017 Taylor & Francis Group, LLC.

关键词： Probes

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Blue Energy: Polymeric Nano‐Blue‐Energy Generator Based on Anion‐Selective Ionomers with 3D Pores and pH‐Driving Gating (Adv. Energy Mater. 44/2020)

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Advanced Energy Materials 2020年第44期10卷

作者： Xuanbo Zhu Jundong Zhong Junran Hao Yuzhang Wang Jiajia Zhou Jingwen Liao Yujie Dong Jinhui Pang Haibo Zhang Zizhun Wang Wei Zhang Weitao Zheng Zhenhua Jiang Yahong Zhou Lei Jiang National and Local Joint Engineering Laboratory for Synthetic Technology of High Performance Polymer College of Chemistry Jilin University Changchun Jilin 130012 P. R. China CAS Key Laboratory of Bio‐inspired Materials and Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China Beijing Advanced Innovation Center for Biomedical Engineering Beihang University Beijing 100191 P. R. China Guangzhou Institute of Advanced Technology Chinese Academy of Sciences Guangzhou Guangdong 511458 P. R. China State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology College of Chemical Engineering Zhejiang University of Technology Hangzhou Zhejiang 310014 P. R. China State Key Laboratory of Automotive Simulation and Control School of Materials Science and Engineering Electron Microscopy Center International Center of Future Science Jilin University Changchun Jilin 130012 P. R. China

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Magnetic and topological transitions in three-dimensional topological Kondo insulator

arXiv

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arXiv 2018年

作者： Li, Huan Wang, Zhi-Yong Zheng, Xiao-Jun Liu, Yu Zhong, Yin College of Science Guilin University of Technology Guilin541004 China Institute of Applied Physics and Computational Mathematics Beijing100088 China Software Center for High Performance Numerical Simulation China Academy of Engineering Physics Beijing100088 China Center for Interdisciplinary Studies & Key Laboratory for Magnetism and Magnetic Materials of the MoE Lanzhou University Lanzhou730000 China

By using an extended slave-boson method, we draw a global phase diagram summarizing both magnetic phases and paramagnetic (PM) topological insulating phases (TIs) in three-dimensional topological Kondo insulator (TKI). By including electron hopping (EH) up to third neighbor, we identify four strong topological insulating (STI) phases and two weak topological insulating (WTI) phases, then the PM phase diagrams characterizing topological transitions between these TIs are depicted as functions of EH, f-electron energy level and hybridization constant. We also find an insulator-metal transition from a STI phase which has surface Fermi rings and spin textures in qualitative agreement to TKI candidate SmB6. In weak hybridization regime, anti-ferromagnetic (AF) order naturally arises in the phase diagrams, and depending on how the magnetic boundary crosses the PM topological transition lines, AF phases are classified into AF topological insulator (AFTI) and non-topological AF insulator (nAFI), according to their Z2 indices. In two small regions of parameter space, two distinct topological transition processes between AF phases occur, leading to two types of AFTI, showing distinguishable surface dispersions around their Dirac points. Copyright © 2018, The Authors. All rights reserved.

关键词： Phase diagrams

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Spin-triplet excitonic insulator: The case of graphone

arXiv

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arXiv 2019年

作者： Jiang, Zeyu Lou, Wenkai Liu, Yu Li, Yuanchang Song, Haifeng Chang, Kai Duan, Wenhui Zhang, Shengbai State Key Laboratory of Low-Dimensional Quantum Physics Collaborative Innovation Center of Quantum Matter Department of Physics Tsinghua University Beijing100084 China SKLSM Institute of Semiconductors Chinese Academy of Sciences P.O. Box 912 Beijing100083 China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing100088 China Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China CAEP Software Center for High Performance Numerical Simulation Beijing100088 China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing100190 China Institute for Advanced Study Tsinghua University Beijing100084 China Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute TroyNY12180 United States

While various excitonic insulators have been studied in the literature, due to the perceived too-small spin splitting, spin-triplet excitonic insulator is rare. In two-dimensional systems such as a graphone, however, it is possible, as revealed by first-principles calculations coupled with Bethe-Salpeter equation. The critical temperature, given by an effective Hamiltonian, is 11.5 K. While detecting excitonic insulators is still a daunting challenge, the condensation of triplet excitons will result in spin superfluidity, which can be directly measured by a transport experiment. Nonlocal dielectric screening also leads to an unexpected phenomenon, namely, an indirect-to-direct transition crossover between single-particle band and exciton dispersion in graphone, which offers yet another test by experiment. Copyright © 2019, The Authors. All rights reserved.

关键词： Calculations

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Research on face recognition method based on deep learning in natural environment

Research on face recognition method based on deep learning i...

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International Conference on Awareness Science and technology (iCAST)

作者： Jia Li Yan Longfei Zhang YuFeng Wu Penghui Guo Fuquan Zhang Shuo Tang Gangyi Ding Lin Xu Digital Performance and Simulation Key Laboratory Beijing Institute of Technology Beijing China Fujian Provincial Key Laboratory of Information Processing and Intelligent Control Minjing University Fuzhou China School of Software Beijing Institute of Technology Beijing China Innovative Information Industry Research Institute Fujian Normal University Fuzhou Fujian CN

In the present study, there are a number of recognition methods with high recognition accuracy, which are based on deep learning. However, these methods usually have a good effect in a restricted environment, but in the natural environment, the accuracy of face recognition has decreased significantly, especially in the case of occlusion, face recognition will appear inaccurate or unrecognized situation. Based on this, this paper presents a face recognition method based on the deep learning in the natural environment, hoping to achieve robust performance in the natural environment, especially in the case of occlusion. The main contribution of this paper is improving the method of multi-patches by using 4 areas' patches in the face. And in order to have a higher performance, we use a Joint Bayesian (JB) measure in face-verification. Finally, we trained the model by the set of CASIA-WebFace and test it in the Labeled Faces in the Wild (LFW).

关键词： Face Face recognition Feature extraction Training Databases Bayes methods Conferences

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Z2classification for a novel antiferromagnetic topological insulating phase in three-dimensional topological Kondo insulator

arXiv

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arXiv 2018年

作者： Li, Huan Zhong, Yin Liu, Yu Luo, Hong-Gang Song, Hai-Feng College of Science Guilin University of Technology Guilin541004 China Center for Interdisciplinary Studies Key Laboratory for Magnetism and Magnetic Materials of the MoE Lanzhou University Lanzhou730000 China Institute of Applied Physics and Computational Mathematics Beijing100088 China Software Center for High Performance Numerical Simulation China Academy of Engineering Physics Beijing100088 China Beijing Computational Science Research Center Beijing100084 China

Antiferromagnetic topological insulator (AFTI) is a topological matter that breaks time-reversal symmetry. Since its proposal, explorations of AFTI in strong-correlated systems are still lacking. In this paper, we show for the first time that a novel AFTI phase can be realized in three-dimensional topological Kondo insulator (TKI). In a wide parameter region, the ground states of TKI undergo a second-order transition to antiferromagnetic insulating phases which conserve a combined symmetry of time reversal and a lattice translation, allowing us to derive a Z2-classification formula for these states. By calculating the Z2index, the antiferromagnetic insulating states are classified into (AFTI) or non-topological antiferromagnetic insulator (nAFI) in different parameter regions. On the antiferromagnetic surfaces in AFTI, we find topologically protected gapless Dirac cones inside the bulk gap, leading to metallic Fermi rings exhibiting helical spin texture with weak spin-momentum locking. Depending on model parameters, the magnetic transitions take place either between AFTI and strong topological insulator, or between nAFI and weak topological insulator. By varying some model parameters, we find a topological transition between AFTI and nAFI, driving by closing of bulk gap. Our work may account for the pressure-induced magnetism in TKI compound SmB6, and helps to explore richer AFTI phases in heavyfermion systems as well as in other strong-correlated systems. Copyright © 2018, The Authors. All rights reserved.

关键词： Antiferromagnetism

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