Engineering Interfaces for High-Performance Oxide Superconductor Nanocomposite Films

高性能氧化物超导体纳米复合薄膜的工程接口

• 批准号: 1909292
• 负责人: Judy Wu
• 金额: $ 50.27万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1909292&HistoricalAwards=false
• 关键词: Engineering; Interfaces; Performance; Oxide; Superconductor

NON-TECHNICAL DESCRIPTION: Superconductors are materials that can carry electric currents without loss, which is one of the most exotic physical phenomena in nature and is described quantitatively by the superconducting critical current density Jc. Therefore, superconductivity offers applications such as quantum computing to meet future computing needs and restoring the reliability of the power grid alongside increasing its capacity and efficiency. The discovery of oxide high temperature superconductors (HTSs) provides possibilities for superconductors in applications at liquid nitrogen temperature and presents a fascinating research topic due to their unusual electronic structure and layered crystalline structures which gives profound effects on their physical properties, especially Jc. Raising Jc in HTSs has been the focus of world-wide efforts in the field of applied superconductivity. Growth of nanoscale artificial pinning centers (APCs) provides a powerful approach to raise Jc in nanocomposites, and the method can be directly implemented to large-scale HTS devices for commercialization. This project investigates the strained interfaces, the key driving force in strain-mediated self-assembly of APCs and the determining factor of the APC's pinning efficiency and hence Jc in nanocomposites. The goal is to achieve controllable APCs with precisely designed morphology, orientation, density, and interfaces. The scientific knowledge developed through this project will broadly impact future electronic and electrical applications. Nanoscale control of interfaces applies to computing, sensing, catalysis, and energy production/storage. The integrated modeling-synthesis-characterization approach can be extended to a range of nanocomposites beyond HTSs including ferroelectric, multiferroic, magnetoelectrics and semiconductors to produce novel and unprecedented properties. Both undergraduate and graduate students are gaining the cutting-edge research experience in preparation for careers in science and engineering. Students, especially those from underrepresented groups, are recruited through on campus programs (such as Research Experiences for Undergraduates (REU) Site and APS Bridge programs), collaborators and alumni. TECHNICAL DETAILS: This project focuses on understanding and manipulating interface strains towards controllable growth and high pinning efficiency of nanoscale artificial pinning centers (APCs) in REBa2Cu3O7 (RE-123, RE for rare earth elements Y, Gd, Sm, etc.), aiming at high critical current density (Jc) in a strong magnetic field (H) in the APC/RE-123 nanocomposites. The project has four topics. Topic 1 investigates the pinning efficiency of c-axis aligned one dimensional (1D) APCs, especially the effect of the strained interfaces on Jc and pinning force density Fp. Topic 2 explores schemes, particularly multilayered 1D nanocomposites by insertion of the Ca-substituted RE-123 spacers, for repairing the defective interfaces for enhanced pinning efficiency. Based on theoretical predictions, topic 3 searches for new 1D APCs with small diameters approaching the coherence length and self-repairing functionality. Topic 4 explores APCs of mixed morphologies for H-orientation independent Jc using microscopic control of the strain field in nanocomposites.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述：超导体是一种能够无损耗地携带电流的材料，这是自然界中最奇异的物理现象之一，由超导临界电流密度Jc定量描述。因此，超导提供了量子计算等应用，以满足未来的计算需求，并在提高电网容量和效率的同时恢复电网的可靠性。氧化物高温超导体(HTS)的发现为超导体在液氮温度下的应用提供了可能，并因其特殊的电子结构和层状晶体结构而成为一个引人入胜的研究课题，这对其物理性质尤其是JC产生了深刻的影响。在高温超导中提高JC一直是世界各国在应用超导领域努力的焦点。纳米级人工钉扎中心(APC)的生长为提高纳米复合材料的JC提供了一条有效的途径，该方法可以直接实现到大规模HTS器件的商业化。该项目研究了应变界面，这是APC应变自组装的关键驱动力，以及APC钉扎效率的决定因素，从而决定了纳米复合材料中的JC。目标是获得可控的、具有精确设计的形态、取向、密度和界面的APC。通过该项目发展的科学知识将广泛影响未来的电子和电气应用。界面的纳米级控制适用于计算、传感、催化和能源生产/存储。集成的建模-合成-表征方法可以扩展到高温超导以外的一系列纳米复合材料，包括铁电、多铁、磁电和半导体，以产生新颖和前所未有的性能。本科生和研究生都在获得前沿的研究经验，为在科学和工程领域的职业生涯做准备。学生，特别是那些来自代表不足的群体的学生，通过校园项目(如本科生研究体验网站和APS桥梁项目)、合作者和校友来招募。技术细节：本项目致力于了解和控制界面应变，以实现REBa2Cu3O7中纳米级人工钉扎中心(APC)的可控生长和高钉扎效率(RE-123，RE对于稀土元素Y，Gd，Sm等)，旨在实现APC/RE-123纳米复合材料在强磁场(H)下的高临界电流密度(JC)。该项目有四个主题。主题1研究了c轴取向的一维APC的钉扎效率，特别是应变界面对JC和钉扎力密度FP的影响。主题2探索了修复缺陷界面以提高钉扎效率的方案，特别是通过插入钙取代的RE-123间隔物的多层一维纳米复合材料。基于理论预测，主题3寻找新的一维APC，其直径接近相干长度和自修复功能。主题4探索了利用纳米复合材料中应变场的微观控制来为H取向独立的JC探索混合形态的APC。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Field/valley plasmonic meta-resonances in WS2 -metallic nanoantenna systems: Coherent dynamics for molding plasmon fields and valley polarization

• DOI: 10.1103/physrevb.105.035426
• 发表时间: 2022-01
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: S. M. Sadeghi;Judy Z. Wu

Development of an ALD-Pt@SWCNT/Graphene 3D Nanohybrid Architecture for Hydrogen Sensing

• DOI: 10.1021/acsami.0c15532
• 发表时间: 2020-11-25
• 期刊: ACS APPLIED MATERIALS & INTERFACES
• 影响因子: 9.5
• 作者: Liu, Bo;Alamri, Mohammed;Wu, Judy Z.
• 通讯作者: Wu, Judy Z.

In vacuo atomic layer deposition and electron tunneling characterization of ultrathin dielectric films for metal/insulator/metal tunnel junctions

金属/绝缘体/金属隧道结超薄介电薄膜的真空原子层沉积和电子隧道表征

• DOI: 10.1116/1.5141078
• 发表时间: 2020
• 期刊: Journal of Vacuum Science & Technology A
• 影响因子: 2.9
• 作者: Wu, Judy Z.;Acharya, Jagaran;Goul, Ryan
• 通讯作者: Goul, Ryan

Enhancing magnetic pinning by BaZrO 3 nanorods forming coherent interface by strain-directed Ca-doping in YBa 2 Cu 3 O 7−x nanocomposite films

通过在 YBa 2 Cu 3 O 7-x 纳米复合薄膜中通过应变定向 Ca 掺杂形成相干界面来增强 BaZrO 3 纳米棒的磁钉扎

• DOI: 10.1088/1361-6668/ac1fd3
• 发表时间: 2021
• 期刊: Superconductor Science and Technology
• 影响因子: 3.6
• 作者: Ogunjimi, Victor;Sebastian, Mary Ann;Zhang, Di;Gautam, Bibek;Jian, Jie;Huang, Jijie;Zhang, Yifan;Haugan, Timothy;Wang, Haiyan;Wu, Judy
• 通讯作者: Wu, Judy

Probing the Origin of Light-Enhanced Ion Diffusion in Halide Perovskites

• DOI: 10.1021/acsami.1c05268
• 发表时间: 2021-07-12
• 期刊: ACS APPLIED MATERIALS & INTERFACES
• 影响因子: 9.5
• 作者: Marshall, Angelo D.;Acharya, Jagaran;Wu, Judy Z.
• 通讯作者: Wu, Judy Z.