Tweak Superconductivity at Nanoscale

在纳米尺度上调整超导性

• 批准号: 0803149
• 负责人: Judy Wu
• 金额: $ 34.34万
• 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: 2008
• 资助国家: 美国
• 起止时间: 2008-06-01 至 2012-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0803149&HistoricalAwards=false
• 关键词: Tweak; Superconductivity; Nanoscale

Technical: This project addresses current carrying capability in high-temperature superconductor (HTS) films. The focus of the project is on novel experimental approaches, such as incorporation of porosity by nanoscale strain effects, and physical properties of HTS films. Three topics will be investigated: 1) physics of critical current density in single HTS nanobridges and networks of HTS nanobridges fabricated using e-beam lithography. The HTS materials include YBCO), Tl-based (Tl-HTS) and Hg-based (Hg-HTS) superconductors; 2) porous YBCO films via a process that combines vicinal growth and nanoparticle insertion. The mechanism of pore initiation and pore evolution will be studied to increase basic understanding and for its use toward achieving control of pore morphology, density, and interface features. Electric transport properties will be assessed to understand and utilize correlation between microstructure and transport properties in formulating schemes for HTS devices with high current carrying capability approaching theoretical limits. 3) focus will be on the microscopic growth mechanism of linear defects, specifically nanotube pores through micrometer thickness of YBCO films. Non-technical: The project addresses basic research issues in a topical area of electronic materials science with high technological relevance. Research and educational activities will be integrated by involvement of undergraduates in the research program, and incorporating new research results into the classroom, striving for forefront education to the next generation in nanoscience, material science, and physics.

技术：该项目致力于解决高温超导 (HTS) 薄膜的载流能力。该项目的重点是新颖的实验方法，例如通过纳米级应变效应结合孔隙率，以及高温超导薄膜的物理性质。将研究三个主题：1）单个高温超导纳米桥和使用电子束光刻制造的高温超导纳米桥网络中临界电流密度的物理学。 HTS材料包括YBCO)、Tl基(Tl-HTS)和Hg基(Hg-HTS)超导体； 2）通过结合邻位生长和纳米粒子插入的工艺制备多孔YBCO薄膜。将研究孔隙萌生和孔隙演化的机制，以增进基本了解并利用其实现对孔隙形态、密度和界面特征的控制。将评估电传输特性，以了解和利用微观结构和传输特性之间的相关性，为具有接近理论极限的高载流能力的高温超导器件制定方案。 3）重点将放在线性缺陷的微观生长机制上，特别是穿过微米厚度的YBCO薄膜的纳米管孔。非技术性：该项目解决具有高度技术相关性的电子材料科学主题领域的基础研究问题。通过本科生参与研究计划，将研究和教育活动结合起来，并将新的研究成果融入课堂，努力为下一代提供纳米科学、材料科学和物理学的前沿教育。