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：超导体是能够无损耗地承载电流的材料，这是自然界中最奇特的物理现象之一，用超导临界电流密度Jc来定量描述。因此，超导提供了量子计算等应用，以满足未来的计算需求，恢复电网的可靠性，同时提高其容量和效率。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性，并且由于其不寻常的电子结构和层状晶体结构对其物理性质（尤其是Jc）产生深远影响，因此提出了一个引人入胜的研究课题。提高高温超导中的Jc一直是全球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中的Jc提供了一种强有力的方法，并且该方法可以直接应用于大规模高温超导装置以实现商业化。该项目研究了应变界面、APC 应变介导自组装的关键驱动力以及 APC 钉扎效率以及纳米复合材料中 Jc 的决定因素。目标是实现具有精确设计的形态、方向、密度和界面的可控装甲运兵车。通过该项目开发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材料之外的一系列纳米复合材料，包括铁电材料、多铁材料、磁电材料和半导体，以产生新颖且前所未有的特性。本科生和研究生都在获得前沿的研究经验，为科学和工程领域的职业生涯做好准备。学生，尤其是来自代表性不足群体的学生，是通过校园项目（例如本科生研究经验 (REU) 站点和 APS 桥项目）、合作者和校友招募的。技术细节：该项目的重点是了解和操纵界面应变，以实现 REBa2Cu3O7（RE-123、稀土元素 Y、Gd、Sm 等稀土元素的 RE）中纳米级人工钉扎中心 (APC) 的可控生长和高钉扎效率，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 c 轴对齐的一维 (1D) 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 探讨了修复缺陷界面以提高钉扎效率的方案，特别是通过插入 Ca 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寻找具有接近相干长度的小直径和自修复功能的新型一维APC。主题 4 利用纳米复合材料应变场的微观控制，探索 H 取向独立 Jc 的混合形态 APC。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值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.