Defect-Managed, High-Mobility Oxide Thin Films and Heterostructures for Fundamental Study

用于基础研究的缺陷管理、高迁移率氧化物薄膜和异质结构

• 批准号: 1410888
• 负责人: Bharat Jalan
• 金额: $ 36.6万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-15 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1410888&HistoricalAwards=false
• 关键词: Defect; Managed; Mobility; Oxide; Thin

NON-TECHNICAL DESCRIPTION: This project focuses on the development of an advanced state-of-the-art thin film deposition technique for the synthesis of a new class of complex oxides that are highly perfect. These materials possess multi-functional properties that are of great interest for next generation devices of power electronics and energy conversion. The exploration of these materials with unprecedented structure quality and low defects provides valuable input for experimental testing of theoretical models, in addition to facilitating the fundamental study of materials physics at reduced size and dimensionality. The research activities contribute to the professional development experience for students from local high schools, minority organizations and community colleges through training and "science awareness" workshops. TECHNICAL DETAILS: Through the establishment of molecular beam epitaxy growth approaches, this project is studying the fundamental physics of highly stoichiometric, precisely doped, defect-managed complex oxides with outstanding potential for room temperature electronics. The project is seeking to exploit these structures by conducting detailed structural and electronic transport studies in order to understand, and eventually control, specific defects, local structure, and electronic mobility. In particular, the work is seeking a fundamental understanding of factors, which control room temperature electron mobility in perovskite oxides using a "model" material system (BaSnO3) that presents opportunities to enhance electron mobility at room temperature via defect-management and remote doping approaches. The project is providing opportunities for graduate, undergraduate and high school students to obtain training in the interdisciplinary areas of materials science and engineering, electrical engineering, materials chemistry, and materials physics. Students are gaining experience with cutting-edge thin film deposition approaches, advanced characterization techniques, and theoretical calculations. The project also contributes to the education outreach by training students enrolled in a vacuum and thin film technology program at local community colleges in Minneapolis. These students are often find employment as technicians after completing this program.

非技术描述：该项目重点开发先进的薄膜沉积技术，用于合成高度完美的新型复合氧化物。这些材料具有多功能特性，对下一代电力电子和能量转换设备非常感兴趣。对这些具有前所未有的结构质量和低缺陷的材料的探索为理论模型的实验测试提供了宝贵的输入，此外还促进了材料物理在减小尺寸和维度下的基础研究。研究活动通过培训和“科学意识”讲习班为当地高中、少数群体组织和社区大学的学生提供专业发展经验。技术细节：通过建立分子束外延生长方法，该项目正在研究高度化学计量、精确掺杂、缺陷管理的复合氧化物的基础物理，在室温电子学方面具有突出的潜力。该项目正在寻求通过进行详细的结构和电子传输研究来利用这些结构，以了解并最终控制特定缺陷、局部结构和电子移动性。特别是，这项工作正在寻求对使用“模型”材料系统（BaSnO3）控制钙钛矿氧化物中室温电子迁移率的因素的基本了解，该系统提供了通过缺陷管理和远程掺杂方法增强室温电子迁移率的机会。该项目为研究生、本科生和高中生提供获得材料科学与工程、电气工程、材料化学和材料物理等跨学科领域培训的机会。 学生们正在获得尖端薄膜沉积方法、先进表征技术和理论计算的经验。该项目还通过培训明尼阿波利斯当地社区学院真空和薄膜技术项目的学生来促进教育推广。这些学生在完成该课程后通常会找到技术人员的工作。