Magnetoelectronic Properties of Perovskite Heterostructures

***非技术摘要***尽管目前的微电子设备的应用范围非常广泛，在设计和结构上也有令人眼花缭乱的变化，但它们都是基于一个单一的设计概念——通过使用它们的电荷来操纵电子。新兴的自旋电子学领域有望彻底改变微电子学，通过利用电子的另一个固有特性——自旋，提供更低的功耗，增加现有设备的功能，并创造全新的电子设备。该项目将采用多种氧化物材料制造一系列结构，为解决技术进步道路上的基础科学问题提供独特的机会。从本质上讲，氧化物材料的独特特性将用于获取对技术既基础又重要的新物理学。这项工作的更广泛影响是由技术相关性，新电子设备发展的潜在社会效益，以及参与研究的研究生和本科生的高水平跨学科教育和培训方法提供的。***技术摘要***自旋电子学这一新兴领域有望通过利用电子的自旋和电荷来彻底改变微电子学。这个个人研究项目将利用多功能钙钛矿氧化物制造一组磁性异质结构，为自旋电子学提供一些最重要的基本问题。这些异质结构将由电子和空穴掺杂的钙钛矿、铁磁体、绝缘体和金属组成，将使研究对磁性能的电气控制、对磁场具有高灵敏度的双极函数和对电子基态的电气控制成为可能。更广泛的影响来自技术相关性、预期的研究成果的广泛传播以及对年轻研究人员的高水平跨学科教育。总体目标是实现一系列具有其他材料无法获得的功能的异质结构，然后使用这些结构来阐明凝聚态物理中未解决的基本问题。

*** NON-TECHNICAL ABSTRACT ***Despite their enormous range of application, and bewildering variation in design and architecture, current microelectronic devices are based on a single design concept - manipulating electrons by using their charge. The emerging field of spin-electronics promises to revolutionize microelectronics, providing lower power consumptions, increased functionality of current devices and the creation of entirely new electronic devices, by using another intrinsic property of the electron - its spin. This project will employ a variety of oxide materials in the fabrication of a set of structures that provide unique opportunities to tackle fundamental basic science issues that lie in the path of technological progress. In essence, the unique features of the oxide materials will be used to access new physics that is both fundamental and important for technology. The broader impacts of the work are provided by the technological relevance, the potential societal benefits of the development of new electronic devices, and the high level inter-disciplinary approach to the education and training of the graduate and undergraduate students involved in the research. *** TECHNICAL ABSTRACT ***The emerging field of spin-electronics promises to revolutionize microelectronics by using the spin of the electron in addition to its charge. This individual investigator project will utilize multi-functional perovskite oxides in the fabrication of a set of magnetic heterostructures providing access to some of the most important fundamental issues in spin-electronics. These heterostructures, which will be comprised of electron and hole doped perovskites, ferromagnets, insulators and metals, will enable the investigation of electrical control over magnetic properties, bipolar function with high sensitivity to magnetic fields, and electrical control over the electronic ground state. The broader impacts derive from technological relevance, the anticipated broad dissemination of research results, and the high level inter-disciplinary approach to the education of young researchers. The overall goal is the realization of a family of heterostructures with functionality that cannot be accessed in other materials, followed by the use of these structures to elucidate basic unsolved issues in condensed matter physics.