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Field-Induced Butterfly-Like Anisotropic Magnetoresistance in a Kagome Semimetal Co3In2S2

ADVANCED FUNCTIONAL MATERIALS 2025年第2期35卷

作者： Lv, Senhao Guo, Hui Qi, Qi Li, Yuhui Hu, Guojing Zheng, Qi Wang, ruwen Si, Nan Zhu, Ke zhao, Zhen Han, Yechao Yu, Weiqi Xian, Guoyu Huang, Li Bao, Lihong Lin, Xiao Pan, Jinbo Du, Shixuan He, Jun Yang, Haitao Gao, Hong-Jun Cent Iron & Steel Res Inst Div Funct Mat Beijing 100081 Peoples R China Chinese Acad Sci Inst Phys Beijing Natl Ctr Condensed Matter Phys Beijing 100190 Peoples R China Univ Chinese Acad Sci Sch Phys Sci Beijing 100049 Peoples R China Shenyang Univ Technol Multidisciplinary Ctr Infrastructure Engn Shenyang 110870 Liaoning Peoples R China Songshan Lake Mat Lab Dongguan 523808 Peoples R China

With the interplay between magnetism and topological bands, magnetic kagome semimetals provide promising platforms for exploring exotic correlated electronic states and quantum phenomena such as anomalous Hall effect, quantum spin liquid, and unconventional magnetoresistance, as well as driving advances in electronic and spintronic applications. Here, a field-induced butterfly-like anomalous anisotropic magnetoresistance (AMR) effect in an intriguing kagome semimetal Co3In2S2 is reported. The kagome-lattice Co3In2S2 single crystals are synthesized via a polycrystal-source chemical vapor transport approach, possessing a high carrier mobility reaching 10(4) cm(2)V(-1)s(-1). The Co3In2S2 single crystal exhibits a canted antiferromagnetic state below 5 K, but intriguingly, it is easily transformed into a ferromagnetic state under a small external magnetic field. Furthermore, the planar Hall effect (PHE) is detected, stemming from the complex contribution of field-induced ferromagnetism and orbital magnetoresistance. Remarkably, as the magnetic field increases, the low-temperature magnetoresistance behavior of the Co3In2S2 reveals a butterfly-like AMR effect with a maximum value of 850%, exhibiting a superposition of the two-, four-, and six-fold AMR terms. Band structure calculations suggest that such a field-induced butterfly-like AMR effect may originate from the modulations of the electronic structure near the Fermi level by the magnetic moment. The findings offer a valuable platform for understanding the anomalous AMR effect and for the development of advanced spintronic devices.

关键词： butterfly-like AMR effect canted antiferromagnetic state high carrier mobility kagome-lattice Co3In2S2 planar Hall effect

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Tri-level robust planning-operation co-optimization of distributed energy storage in distribution networks with high PV penetration

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APPLIED ENERGY 2020年 279卷 115768-115768页

作者： zhao, Bo Ren, Junzhi Chen, Jian Lin, Da Qin, ruwen State Grid Zhejiang Elect Power Corp Res Inst Hangzhou 310014 Peoples R China Shandong Univ Sch Elect Engn Jinan 250061 Peoples R China Missouri Univ Sci & Technol Dept Engn Management & Syst Engn Rolla MO 65409 USA

High penetrations of photovoltaic (PV) in distributed networks lead to negative impacts such as voltage violations, which is getting worse when large-scale distributed PV systems come into picture. Due to deficiencies involved in traditional voltage regulation devices (TVRDs), energy storage systems, especially the distributed energy storage (DES) systems, are introduced to handle this problem. Majority challenges in planning and operating DES come from uncertainties involved in generation sources and loads, which dims the benefits from energy storage systems. This paper presents a novel tri-level robust planning-operation co-optimization model to determine the capacity, power, location and scheduling strategy of DES. A tri-level decomposition algorithm, which is composed of security-operation and optimal-dispatch cutting planes, is introduced to solve the non convex min-max-min optimization problem. Case studies and sensitivity analyses further verify the proposed methodology and demonstrate its effectiveness.

关键词： Energy storage Uncertainty Robust planning-operation co-optimization Tri-level decomposition Voltage violation

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Giant enhancement of third harmonic generation via guided mode resonances in notched silicon waveguides

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APPLIED PHYSICS LETTERS 2024年第10期124卷 101101-101101页

作者： Wang, Ziyu zhao, Qiming Tang, Wenjie Gao, Yajun He, Jie Zhu, Yi Wang, Shuxian Yu, Haohai Peng, ruwen Wang, Mu Nanjing Univ Sch Phys Natl Lab Solid State Microstruct Nanjing 210093 Peoples R China Nanjing Univ Collaborat Innovat Ctr Adv Microstruct Nanjing 210093 Peoples R China Shandong Univ State Key Lab Crystal Mat Jinan 250100 Peoples R China Shandong Univ Inst Crystal Mat Jinan 250100 Peoples R China Amer Phys Soc Hauppauge NY 11788 USA

We report a giant enhancement of the third harmonic generation (THG) at 343 nm by periodically notched silicon waveguide arrays supporting guided mode resonances (GMRs) at 1030 nm. Maximum efficiency of the third harmonic generation eta = 7.71 x 10(-5) is achieved with a peak pump power density of 5.31 GW/cm(2). The enhancement factor of the THG from the GMR metasurface reaches up to 1.3 x 10(7) compared to a flat silicon film with the same thickness. This observation demonstrates a promising approach to design high-efficiency nonlinear optical metasurfaces.

关键词： Harmonic generation

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Pre-Harvest Chitooligosaccharide Application Enhances Phenolic Composition, Antioxidant Capacity, and Sensory Quality of Cabernet Gernischt Grapes ( Vitis Vinifera L.) And Wine

SSRN

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SSRN 2025年

作者： zhao, Man Guan, ruwen Wang, Kai Zhang, Xueya Mou, Mingjie Li, Min Sam, Faisal Eudes Jiang, Yumei College of Food Science and Engineering Gansu Agricultural University Lanzhou730070 China College of Enology Northwest A&F University Xianyang712100 China

This study evaluates the effects of pre-harvest chitooligosaccharide (COS) application on the quality of Cabernet Gernischt grapes and wine. Grapevines were sprayed with 0.37 mM COS and 0.1% Tween 80 at fruit expansion (CE), veraison (CV), and maturity (CM) stages, for the control (CK), water was used with 0.1% Tween 80. Post-harvest, the physicochemical properties, phenolic composition, antioxidant capacity, color attributes, and sensory characteristics of the grapes and wine were analyzed. COS treatment promoted the physicochemical indicators, phenolic substances, antioxidant capacity and color quality of grapes compared to CK, thus improving the quality of wine. Sensory evaluation showed the sensory quality of wine treated with COS is superior to that of CK, especially for the CM stage produced the best sensory quality. These findings demonstrate that COS is an effective plant elicitor for enhancing red wine grape and wine quality, offering a practical approach to improving sensory and physicochemical attributes. © 2025, The Authors. All rights reserved.

关键词： Wine

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Microswimmer-based electrochemical platform with active capturer/signal amplifier/funnel-type device for whole blood detection

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CHEMICAL ENGINEERING JOURNAL 2022年第Part4期430卷 132665-132665页

作者： Wang, Qi Tang, Xueting Lv, ruwen Tan, Kaiyuan zhao, Zinan Wan, Mimi Mao, Chun Nanjing Normal Univ Natl & Local Joint Engn Res Ctr Biomed Funct Mat Sch Chem & Mat Sci Nanjing 210023 Peoples R China

To effectively detect trace disease markers in whole blood is still a great challenge. Here, a separated capture-detection electrochemical detection platform based on active capture capability/signal amplifier/funnel-type detection device is proposed. Firstly, Mg-based microswimmers modified with magnetic nanomaterials (Mg/ferric oxide/polydopamine/heparin, Mg/Fe3O4/PDA/Hep) are prepared, which can react with water to produce hydrogen as the driving source and Mg2+ as the signal amplifier to cyclically cut the Mg2+-induced nucleic acid fragment. Secondly, the Mg-based microswimmer gradually consumed the Mg microsphere and left the magnetic nanomaterials containing the trapping agent, which can be completely recovered by the magnetic electrode. Finally, the funnel-type electrochemical detection device was applied to fully collect the recognizer for detection in milliliter solution. This strategy can be expected to provide a candidate approach for the early and accurate diagnosis of diseases.

关键词： Microswimmer Whole blood detection Signal amplifier Active capture Trace disease markers

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区块链物联网设备与无线访问点双向认证方案

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网络空间安全 2019年第12期10卷 8-14页

作者：唐呈俊蔡国宝徐慧赵汝文叶俊桂林电子科技大学计算机与信息安全学院广西桂林541004 桂林电子科技大学数学与计算科学学院广西桂林541004 海南大学计算机与网络空间安全学院海南海口570228

文章提出了一种利用区块链现有基础设施,为使用区块链的物联网设备提供无线访问点的双向认证方法。利用区块链中的公钥身份认证体系,对用户的身份进行核验。使用基于可验证随机函数的方法,使用物联网设备可以利用其有限的计算资源,对访... 详细信息

文章提出了一种利用区块链现有基础设施,为使用区块链的物联网设备提供无线访问点的双向认证方法。利用区块链中的公钥身份认证体系,对用户的身份进行核验。使用基于可验证随机函数的方法,使用物联网设备可以利用其有限的计算资源,对访问点提供的数据进行验证。身份验证免疫了伪装、重放攻击,并且该方法对拒绝服务攻击提供了一定的抵抗性。文章提供了一种简单、安全的物联网设备访问区块链服务的接入方案,并且可以推广到对访问任何静态的互联网资源的访问上。

关键词：区块链物联网无线网络身份认证

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Causal Intervention for Object Detection 33

Causal Intervention for Object Detection

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IEEE 33rd International Conference on Tools with Artificial Intelligence (ICTAI)

作者： Huang, Weiqing Jiang, Miao Li, Min Meng, Bo Ren, Junxing zhao, Shixian Bai, ruwen Yang, Yang Chinese Acad Sci Inst Informat Engn Beijing Peoples R China Univ Chinese Acad Sci Sch Cyber Secur Beijing Peoples R China Beijing Inst Technol Sch Opt & Photon Beijing Peoples R China

ISBN: (纸本)9781665408981

We present a causal intervention module (CIM) to improve object detection methods. State-of-the-art object detectors learn the association between image pixels and bounding boxes with labels, which implicitly use contextual information in the backbone. Intuitively, context is such a rich source of information that an improvement due to contextual information is relatively modest. Inspired by this, we use the context explicitly in a novel framework of causal intervention for object detection. Specifically, we use a structural causal model to reveal how context confounders affect the object detection model, and adopt causal intervention to deal with the effect. The proposed CIM is applied to a two-stage object detection baseline, and extensive experiments show its effectiveness.

关键词： object detection visual context causal intervention

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Two-fold symmetry of the in-plane resistance in kagome superconductor Cs(V_(1-x)Ta_(x))_(3)Sb_(5) with enhanced superconductivity

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Chinese Physics B 2024年第7期33卷 9-14页

作者：赵振王汝文张宇航祝轲余维琪韩烨超刘家利胡国静郭辉林晓董晓莉陈辉杨海涛高鸿钧 Beijing National Center for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

The kagome superconductor CsV_(3)Sb_(5) has attracted widespread attention due to its rich correlated electron states including superconductivity, charge density wave(CDW), nematicity, and pair density wave. Notably, the modulation of the intertwined electronic orders by the chemical doping is significant to illuminate the cooperation/competition between multiple phases in kagome superconductors. In this study, we have synthesized a series of tantalum-substituted Cs(V_(1-x)Ta_(x))_(3)Sb_(5) by a modified self-flux method. Electrical transport measurements reveal that CDW is suppressed gradually and becomes undetectable as the doping content of x is over 0.07. Concurrently, the superconductivity is enhanced monotonically from T_(c) ~ 2.8 K at x = 0 to 5.2 K at x = 0.12. Intriguingly, in the absence of CDW, Cs(V_(1-x)Ta_(x))_(3)Sb_(5)(x = 0.12) crystals exhibit a pronounced two-fold symmetry of the in-plane angular-dependent magnetoresistance(AMR) in the superconducting state, indicating the anisotropic superconducting properties in the Cs(V_(1-x)Ta_(x))_(3)Sb_(5). Our findings demonstrate that Cs(V_(1-x)Ta_(x))_(3)Sb_(5) with the non-trivial band topology is an excellent platform to explore the superconductivity mechanism and intertwined electronic orders in quantum materials.

关键词： kagome superconductor charge density wave rotation symmetry breaking

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Spatially anisotropic Kondo resonance intertwined with superconducting gap in kagome metal CsV3-xCrxSb5

arXiv

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arXiv 2025年

作者： Huang, Zichen Chen, Hui Zhang, Zhongqin Zhang, Hao zhao, Zhen Wang, ruwen Yang, Haitao Ji, Wei Wang, Ziqiang Gao, Hong-Jun Beijing National Center for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China Hefei National Laboratory Anhui Hefei230088 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices Department of Physics Renmin University of China Beijing100872 China Department of Physics Boston College Chestnut HillMA02467 United States

The newly-discovered chromium-based kagome metal CsCr3Sb5 has garnered significant interest due to its strong electron correlations, intertwined orders and potential for unconventional superconductivity under high pressure. However, the nature of superconducting and magnetic interactions during the transition from the parent compound CsV3Sb5 to CsCr3Sb5 remains elusive. Here, we report the discovery of spatially anisotropic Kondo resonance which intertwines with the superconducting gap, facilitated by the introduction of magnetic Cr impurities into the kagome superconductor CsV3Sb5. In addition to the gradual suppression of long-ranged charge-density-wave orders, dilute Cr dopants induce local magnetic moments, giving rise to the emergence of Kondo resonances. In addition, the Kondo resonance forms spatially anisotropic ripple-like structures around the Cr dopants, breaking all local mirror symmetries. This anisotropy arises from the antiferromagnetic coupling between itinerant electrons and the Cr-induced spin-up electrons. Remarkably, as the Kondo screening develops, the coherence peak and depth of superconducting gap with finite zero-energy conductance significantly enhances. It indicates that non-superconducting pairs at the Fermi surface in the parent compound participate in the Kondo effect, effectively screening the magnetic moments of Cr dopants while simultaneously enhancing the superfluid density. Our findings pave a unique pathway for exploring the interplay between superconductivity and local magnetic moments in kagome systems. © 2025, CC0.

关键词： Cesium compounds

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微电网群体系架构及能量协同优化运行的SoS方法初探

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中国电机工程学报 2020年第6期40卷 1886-1896页

作者：赵波秦如雯国网浙江省电力有限公司电力科学研究院浙江省杭州市310014 美国密苏里科技大学美国密苏里州65409

含多类型分布式电源、负荷的微电网群呈现出体系(system of systems,So S)的独立自主、归属、可联、异质等特性。该文从So S方法论角度及其自我适应和自我组织能力的机制出发,分析论证了微电网群是一种典型分散式复杂自适应体系(decentr... 详细信息

含多类型分布式电源、负荷的微电网群呈现出体系(system of systems,So S)的独立自主、归属、可联、异质等特性。该文从So S方法论角度及其自我适应和自我组织能力的机制出发,分析论证了微电网群是一种典型分散式复杂自适应体系(decentralizedcomplexadaptiveSo S,DCASoS)的观点。基于此,初步探讨了微电网群能量管理的体系架构及协同优化运行问题,从微电网群DCASoS基本特征的架构建模和微电网群能量协同优化运行方法两方面展开,提出基于DCASo S的微电网群能量协同优化运行架构,力求充分挖掘微电群涌现出的正面效应,避免负面影响,提升微电网群的综合效能,相关成果能够为微电网群能量协同优化运行的研究提供新方法和理论依据。

关键词：微电网群体系方法能量协同优化运行体系架构

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