Magnetoelectronic Properties of Perovskite Heterostructures

*非技术摘要*尽管它们的应用范围很广，在设计和体系结构上也存在令人费解的变化，但目前的微电子设备基于单一的设计概念-利用电子的电荷来操纵电子。新兴的自旋电子学领域有望给微电子学带来革命性的变化，通过使用电子的另一种固有特性--自旋，提供更低的功耗，增加当前设备的功能，并创造出全新的电子设备。该项目将在一系列结构的制造中使用各种氧化物材料，这些结构提供了解决技术进步道路上的基础科学问题的独特机会。本质上，氧化物材料的独特功能将被用来访问新的物理，这对技术来说既基本又重要。这项工作的更广泛影响是通过技术相关性、开发新电子设备的潜在社会效益以及对参与研究的研究生和本科生的教育和培训采取高水平的跨学科方法来提供的。*技术摘要*自旋电子学这一新兴领域有望通过使用电子的自旋和电荷来彻底改变微电子学。这个单独的研究项目将利用多功能钙钛矿氧化物来制造一组磁性异质结构，从而提供对自旋电子学中一些最重要的基本问题的了解。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，将使研究对磁性的电子控制、对磁场高度敏感的双极功能以及对电子基态的电子控制成为可能。更广泛的影响来自于技术相关性、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方法。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尚未解决的基本问题。

*** 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.