FRG: Switchable Two-Dimensional Materials at Oxide Hetero-Interfaces

“这项奖励是根据2009年美国复苏和再投资法案（公法111-5）资助的。”技术。这个重点研究小组（FRG）提案的目标是实现对具有先进特性和新功能的可切换氧化物异质界面的生长和新特性的原子水平理解。这个想法是创造新的二维界面材料，通过外部刺激进行切换，其电子、磁性、光学和输运性质主要取决于原子尺度材料的特性。将探索电导空间调制、可被外加电场调节的可切换界面材料，以及响应磁场的自旋极化界面材料。重点是识别和理解原子水平机制和与原子逐层合成相关的电传输。预计在氧化物界面上功能化2deg可能是变革性的，因为它可能会导致新的研究领域，其中铁电性和2D输运之间的相互作用揭示了对器件应用重要的未开发特性。设想了基于二维界面材料的具有可切换电子和/或自旋电流的逻辑器件。该方法涉及合作协调努力，以探索材料科学问题的生长和可切换氧化物异质界面的新性质。具体任务是：(1)从理论上探索界面特性对材料特性的依赖性；(2)可切换二维氧化物异质界面材料的原子层外延生长与表征；(3)界面电子性质的电输运和磁性表征。非技术。本项目旨在解决电子/光子材料科学中具有技术相关性的主题领域的基础研究问题。本研究有望识别和解决可切换二维界面氧化物异质结构的基础材料科学问题；由这些界面材料制成的原型电子器件可能会有新的广泛的应用。教育和外联活动将与研究结合起来。教育目标是为所有学生提供广泛的跨学科经验。这包括一年级学生通过研究小组进行轮转，在国际机构和阿贡国家实验室工作，与不同背景的个人进行研究互动，以及参与外展项目。通过与U. Puerto rico - mayagez合作，将积极招募来自代表性不足群体的学生。波多黎各的中学教师将前往威斯康星大学进行纳米科学的学习/研究。他们将开发课堂教材，并在波多黎各的学校实施相关项目。研究生将作为教师的导师参与。该项目的成果将通过教师在学校和教育会议上的演讲以及发表文章的方式广泛传播。

"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)." Technical. The goal of this focused research group (FRG) proposal is to achieve an atomic-level understanding of the growth and novel properties of switchable oxide hetero-interfaces, with advanced properties and new functionalities. The idea is to create new 2D interfacial materials, switched by external stimuli, whose electronic, magnetic, optical, and transport properties depend critically on atomic-scale materials characteristics. Switchable interface materials with, spatially modulated conductance, tunable by an applied electric field, and spin-polarized interface materials responding to magnetic fields will be explored. The focus is on identification and understanding of atomic level mechanisms and electrical transport associated with atomic layer-by-layer synthesis. It is anticipated that functionalizing 2DEGs at oxide interfaces may be transformative, in that it could lead to new research fields where interplay between ferroelectricity and 2D transport reveals unexplored properties important for device applications. Logic devices with switchable electron and/or spin current based on 2D interface materials are envisioned. The approach involves a collaborative coordinated effort to explore materials science issues of growth and novel properties of switchable oxide hetero-interfaces. Specific tasks are (1) theoretical exploration of the dependence of interfacial properties on materials characteristics; (2) atomic layer epitaxial growth and characterization of switchable two-dimensional oxide hetero-interface materials; (3) electrical transport and magnetic characterization of interfacial electronic properties. Non-Technical. The project addresses fundamental research issues in a topical area of electronic/photonic materials science having technological relevance. This research is expected to identify and resolve fundamental materials science issues in switchable 2D interfacial oxide heterostructures; prototype electronic devices fabricated from these interfacial materials may find new and wide-ranging applications. Education and outreach activities will be integrated with the research. The education goal is to provide a broad interdisciplinary experience for all students. This includes first-year student rotation through research groups, working in an international institution and the Argonne National Laboratory, research interactions with individuals of diverse backgrounds, and participating in outreach programs. Students from underrepresented groups will be actively recruited through collaboration with U. Puerto Rico-Mayagüez. Secondary school teachers will come from Puerto Rico to the U. WI for a nanoscience learning/research experience. They will develop classroom material, and put in place programs for implementation at their schools in Puerto Rico. Graduate students will be involved as mentors to the teachers. The results of the program will be widely disseminated through teacher presentations at schools and at education conferences, and through published articles.