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Larger in-plane upper critical field and superconducting diode effect observed in topological superconductor candidate InNbS_(2)nanoribbons

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Nano Research 2024年第7期17卷 6686-6694页

作者： Bo Zheng Changlong Wang Xukun Feng Xiaozhen Sun Shasha Wang Dawei Qiu Xiang Ma Ruimin Li guanglei cheng Lan Wang Yalin Lu Peng Li Shengyuan A.Yang Bin Xiang Department of Materials Science and Engineering CAS Key Lab of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Research Laboratory for Quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore School of Microelectronics University of Science and Technology of ChinaHefei 230052China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Lab of Low Dimensional Magnetism and Spintronic Devices School of PhysicsHefei University of TechnologyHefei 230009China Research Laboratory for Quantum Materials IAPMEUniversity of MacaoMacaoChina

Recently,the coexistence of topology and superconductivity has garnered considerable ***,the dimensionality of these materials is crucial for the realization of topological quantum ***,the naturally grown materials,especially with one-dimensional feature that exhibits the coexistence of topology and superconductivity,still face challenges in terms of experimental realization and scalability,which hinders the fundamental research development and the potential to revolutionize quantum ***,we report the first experimental synthesis of quasi-one-dimensional InNbS_(2)nanoribbons that exhibit the coexistence of topological order and superconductivity via a chemical vapor transport ***,the inplane upper critical field of InNbS_(2)nanoribbons exceeds the Pauli paramagnetic limit by more than 2.2 times,which can be attributed to the enhanced spin-orbit coupling and the weakened interlayer interaction between the NbS_(2)layers induced by the insertion of In atoms,making InNbS_(2)exhibit spin-momentum locking similar to that of monolayer NbS_(2).Moreover,for the first time,we report the superconducting diode effect in a quasi-one-dimensional superconductor system without any inherent geometric *** measured maximum efficiency is manifested as 14%,observed atμ0H≈±60 mT,and we propose that the superconducting diode effect can potentially be attributed to the presence of the nontrivial topological *** work provides a platform for studying exotic phenomena in condensed matter physics and potential applications in quantum computing and quantum information processing.

关键词： topological order superconductivity nanoribbon superconducting anisotropy superconducting diode

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Unique electromagnetic wave absorber for three-dimensional framework engineering with copious heterostructures

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Journal of Materials Science & Technology 2024年第3期170卷 129-139页

作者： Liyuan Yu Qianqian Zhu Zhiqiang Guo Yuhang cheng Zirui Jia guanglei Wu Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

In order to obtain high-performance electromagnetic wave absorbers,the adjustment of structure and components is *** on the above requirements,this system forms a three-dimensional frame structure consisting of MXene and transition metal oxides(TMOs)through efficient electrostatic *** three-dimensional network structure has rich heterojunction structures,which can cause a large amount of interface polarization and conduction losses in incident electromagnetic *** structures cause multiple reflections and scattering of electromagnetic waves,which is also an important reason for further increasing electromagnetic wave *** the doping ratio is 1:1,the system has the best impedance matching,the maximum effective absorption bandwidth(EAB max)can reach 5.12 GHz at 1.7 mm,and the minimum reflection loss(RL_(min))is-50.30 dB at 1.8 *** provides a reference for the subsequent formation of 2D-MXene materials into 3D materials.

关键词： MXene Three-dimensional frame Heterojunction structure Conduction loss Electromagnetic wave absorption

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超宽带共形极化敏感阵DOA-极化估计算法及优化

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无线电工程 2024年第8期54卷 2002-2009页

作者：孙家霖王文伟吕胜杰程光磊高火涛向艳杰武汉大学电子信息学院湖北武汉430073 国家广播电视总局2021台黑龙江齐齐哈尔161006 鸣飞伟业技术有限公司湖北武汉430070

针对超宽带共形极化敏感阵列(Conformal Polarization Sensitive Array, CPSA),提出一种用于波达方向(Direction of Arrival, DOA)与极化角联合估计的降维多重信号分类(Multiple Signal Classification, MUSIC)算法,由Monte-Carlo模拟结果可知,DOA估计性能在低频处下降,无法满足信号测向需求。为解决此问题,使用虚拟扩展阵列的方法优化算法,选取不同扩展参数构造虚拟阵列,提高算法可靠性。通过仿真实验可知,优化后的算法能明显改善DOA估计在低频处的抗噪性能与容差性能,显著提高实际应用中信号测向的准确率。

关键词：极化敏感阵列波达方向估计极化估计降维多重信号分类算法虚拟扩展阵列

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Polymorphic cerium-based Prussian blue derivatives with in situ growing CNT/Co heterojunctions for enhanced microwave absorption via polarization and magnetization

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Nano Research 2024年第3期17卷 2050-2060页

作者： Jixi Zhou Xinmeng Huang Di Lan Yuhang cheng Fengyi Xue Chenyu Jia guanglei Wu Zirui Jia Institute of Materials for Energy and Environment State Key Laboratory of Bio-fibers and Eco-textilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

In this paper,the structure evolution of cerium cobaltohexanoate(Ce[Co(CN)6],Ce-Co Prussian blue analog(PBA))has been realized by solvent catalysis at room *** hexagonal bipyramidal microcrystals of Ce-Co PBA can be gradually transformed into dendrites by different proportions of ethanol(EtOH)and *** the same time,the porous dendrites CeO_(2)/Co@carbon nanotub(CNT)with oxygen-rich vacancies(OVs)can be obtained by annealing Ce-Co PBA at 700℃.The microstructure study shows that carbon nanotubes will be catalyzed after annealing at high temperature,and the cobalt metal particles encapsulated in carbon nanotubes will be anchored in the matrix,regulating the impedance matching and multi-polarization suppression of the material,and its unique structure,vacancies,and strong interface effect make the material exhibit excellent electromagnetic wave(EMW)absorption *** the matching thickness is 2.5 mm,the minimum reflection loss(RLmin)of the composite is-51.68 dB,and the effective absorption bandwidth(RL<-10 dB)is 7.76 *** results show that the prepared CeO_(2)/Co@CNT composite has excellent EMW absorption *** is expected to be a candidate material for EMW absorption.

关键词： Ce-Co Prussian blue analog(PBA) carbon nanotubes(CNTs) CeO_(2)/Co@CNT solvent catalysis electromagnetic wave absorption

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High temperature polyimide nanocomposites containing twodimensional nanofillers for improved thermal stability and capacitive energy storage performance

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Nano Research 2024年第8期17卷 7746-7755页

作者： Ding Ai Yuting Han Zongliang Xie Xi Pang Yuan Chang He Li chenglong Wu Yonghong cheng guanglei Wu State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China Institute of Materials for Energy and Environment State Key Laboratory of Bio-Fibers and Eco-TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Future electronic devices toward high integration and miniaturization demand reliable operation of dielectric materials at high electric fields and elevated ***,the electrical deterioration caused by Joule heat generation remains a persistent challenge to ***,the solution-processed polyimide(PI)nanocomposites with unique two-dimensional(2D)alumina nanoplates are *** improvements in the breakdown strength,charge–discharge efficiency and discharged energy density at elevated temperatures have been demonstrated in the composites,owing to simultaneously suppressed conduction loss and increased thermal conductivity upon the incorporation of 2D Al_(2)O_(3) nanofillers possessing excellent dielectric insulation and thermophysical *** predominance of Al_(2)O_(3) nanoplates in enhancing thermal stability and high-temperature capacitive performance over nanoparticles and nanowires is validated experimentally and is further rationalized via finite element ***,the Al_(2)O_(3) nanoplates filled PI nanocomposite exhibits a hightemperature capability up to 200℃ and remarkable efficiency(e.g.≥95% at 200 MV/m)over a wide temperature range,which outperforms commercial dielectric polymers and rivals the state-of-the-art polyimide nanocomposites.

关键词： capacitors polymer nanocomposites high temperature energy storage thermal stability

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Dielectric nanocomposites with superb high-temperature capacitive performance based on high intrinsic dielectric constant polymer

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Nano Research 2024年第9期17卷 8504-8512页

作者： Ding Ai Yuan Chang Haoliang Liu chenglong Wu Yao Zhou Yuting Han Hao Yu Bing Xiao Yonghong cheng guanglei Wu Zirui Jia State Key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China Institute of Materials for Energy and Environment State Key Laboratory of Bio-Fibers and Eco-TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Advancements in power electronics necessitate dielectric polymer films capable of operating at high temperatures and possessing high energy *** significant strides have been achieved by integrating inorganic fillers into high-temperature polymer matrices,the inherently low dielectric constants of these matrices have tempered the magnitude of *** this work,we report an innovative nanocomposite based on sulfonylated polyimide(SPI),distinguished by the incorporation of sulfonyl groups within the SPI backbone and the inclusion of wide bandgap hafnium dioxide(HfO_(2))*** nanocomposite has demonstrated notable enhancements in thermal stability,dielectric properties,and capacitive performance at elevated *** simulations at both molecular and mesoscopic levels have elucidated the mechanisms behind these improvements,which could be attributed to confined segmental motion,an optimized electronic band structure,and a diminished incidence of dielectric breakdown ascribed to the presence of sulfonyl ***,the SPI-HfO_(2)nanocomposite demonstrates a high charge-discharge efficiency of 95.7%at an elevated temperature of 150℃and an applied electric field of 200 MV/***,it achieves a maximum discharged energy density of 2.71 J/cm^(3),signalling its substantial potential for energy storage applications under extreme conditions.

关键词： dielectric polymer nanocomposites high-temperature high dielectric constant sulfonyl groups energy storage performance

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电控液晶分子指向矢和电参数快速建模

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电子元件与材料 2023年第11期42卷 1348-1354,1361页

作者：孙家霖程光磊高火涛王晓峰向艳杰武汉大学电子信息学院湖北武汉430073 国家广播电视总局2021台黑龙江齐齐哈尔161000 武汉大学物理科学与技术学院湖北武汉430073 鸣飞伟业技术有限公司湖北武汉430070

传统电控液晶分子指向矢和电参数建模采用Gauss-Seidel迭代法,选取最大误差收敛法进行计算。该方法适用范围广且计算精度高,但计算效率较低,在一些复杂模型和较高偏压的情况下难以满足建模要求。为解决上述问题,从迭代算法和收敛准则方... 详细信息

传统电控液晶分子指向矢和电参数建模采用Gauss-Seidel迭代法,选取最大误差收敛法进行计算。该方法适用范围广且计算精度高,但计算效率较低,在一些复杂模型和较高偏压的情况下难以满足建模要求。为解决上述问题,从迭代算法和收敛准则方面对传统方法进行改进。首先使用逐次超松弛迭代(Successive Over Relaxation,SOR)方法完成仿真;其次分别选取平均误差收敛法和均方根误差收敛法进行计算。结果表明:改进前后仿真结果精度误差很小,SOR方法计算时间为传统方法的30%~40%,平均误差收敛法与均方根误差收敛法计算时间为传统方法的70%~80%。改进后的建模方法能在保证计算精度的前提下,大幅提高计算效率,为电控液晶射频器件、雷达通信相控阵电参数快速高精度可视化建模及设计提供依据。

关键词：液晶指向矢建模介电特性 SOR方法收敛准则

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Rhodium-catalyzed Cascade Aryl Addition/Intramolecular Lactonization of Phthalaldehydonitrile to Access 3-Aryl- and Alkenylphthalides

Rhodium-catalyzed Cascade Aryl Addition/Intramolecular Lacto...

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第十六届全国金属有机化学学术讨论会

作者： guanglei Lv and Jiang cheng~* College of Chemistry & Materials Engineering,Wenzhou University,Wenzhou 325035

＜正＞A rhodium-catalyzed addition of boronic acids to phthalaldehydonitrile,followed by an intramolecular lactonization to access 3-substituted phthalides,is described. Recently,some efficient approaches to obtain phthalide were developed using ortho-functional benzaldehyde as the *** 2009,Dong reported an atom-economical approach to phthalides by enantioselective

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高频信号传输电缆用银在高温液化后氧扩散系数的测定

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铸造技术 2014年第12期35卷 3069-3070页

作者：程光磊明星黄冈师范学院电子信息科学与技术系湖北黄冈438000 黄冈师范学院材料物理与化学系湖北黄冈438000

以高频信号传输电缆用银为研究对象,采用固体电解质恒电压法测量了该材料在不同温度液化后的氧扩散系数。结果表明,高温1773 K液化后银的氧扩散系数D0=(1.95±0.27)×10-4cm2/s。

关键词：高温液化氧扩散系数电化学方法固体电解质恒电压法

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聚苯硫醚纯化研究

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化工新型材料 2005年第12期33卷 30-32,35页

作者：郭岳程光磊余自力四川大学分析测试中心成都610064

在高温下,用N-甲基吡咯烷酮(NMP)与聚乙二醇(PEG)组成的混合试剂对商品PPS树脂进行纯化处理。纯化产品测试表明,这种方法能有效地去除树脂中存在的无机离子杂质和有机低聚物。进一步的研究表明,与未纯化树脂比较,纯化后树脂的加工性能... 详细信息

在高温下,用N-甲基吡咯烷酮(NMP)与聚乙二醇(PEG)组成的混合试剂对商品PPS树脂进行纯化处理。纯化产品测试表明,这种方法能有效地去除树脂中存在的无机离子杂质和有机低聚物。进一步的研究表明,与未纯化树脂比较,纯化后树脂的加工性能以及热性能都得到明显的改善,可用于纺丝、薄膜和电子封装材料等用途。

关键词：聚苯硫醚离子杂质低聚物纯化性能

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