CAREER: In situ Optical and Magnetotransport Studies of Organic-Ferromagnetic-Semiconductor Hybrid Structures for Spin-Based Electronics

本项目研究有机半导体与铁磁薄膜和半导体异质结构相结合的新型杂化结构中的自旋依赖现象。这是自旋电子学（基于自旋电子学）领域的一个令人着迷的新方向，并且由于有机分子的不寻常性质，例如可调节的自旋轨道耦合和手性分子的不对称自旋散射，有很大的机会实现新的物理现象。为了探索这些和其他可能性，分子束外延合成与原位光学、超快光学和磁输运表征相结合。通过这种方法，可以在超高真空中以原子级精度制备出高质量的层状结构，并且可以在不同的制备阶段研究电子和自旋相关性质的演变。这项工作的长期技术影响是在信息存储，计算，光电子学和柔性显示领域。研究生、本科生、高中生和教师参与这项前沿材料研究，将为南加州内陆帝国以前无法获得的高科技领域提供教育和培训。该项目还通过新课程和研究基础设施的发展，在快速发展的加州大学河滨分校引领新兴的电子/磁性/光学材料研究工作。20世纪下半叶电子学的发展（包括计算机、CD/DVD播放机、手机等）是基于电子电路中电子从一个位置移动到另一个位置。在过去的15年里，科学上的突破使电子的“旋转”运动（类似于篮球的旋转）被用于新技术，如用于计算机硬盘驱动器和多媒体应用的巨型磁阻读头。这种电子学的新范式被称为自旋电子学。该项目开发了新的杂化材料，将传统的无机电子材料（砷化镓、硅、铁等）与有机分子膜结合起来，利用纯无机材料中前所未有的电子自旋。这是基于自旋的电子学研究的一个迷人的新方向。这些混合结构将通过一种称为分子束外延的过程产生，在这种过程中，材料被原子一个原子地或分子一个分子地沉积在超高真空环境中，以获得控制最好、纯度最高的材料和结构。电子的行为及其自旋运动将使用最先进的光学和电子工具进行研究。这项研究可能会导致计算、数据存储、光电子学和显示方面的进步。研究生、本科生、高中生和教师参与这项前沿材料研究，将为南加州内陆帝国以前无法获得的高科技领域提供教育和培训。该项目还通过新课程和研究基础设施的发展，在快速发展的加州大学河滨分校引领新兴的电子/磁性/光学材料研究工作。

This project investigates spin-dependent phenomena in novel hybrid structures that combine organic semiconductors with ferromagnetic films and semiconductor heterostructures. This is a fascinating new direction for the field of spintronics (spin-based electronics) and there are great opportunities to realize new physical phenomena due to the unusual properties of organic molecules, such as adjustable spin-orbit coupling and asymmetric spin scattering by chiral molecules. To explore these and other possibilities, molecular beam epitaxy synthesis is combined with in situ optical, ultrafast optical, and magnetotransport characterization. In this manner, high quality layered structures are fabricated in ultrahigh vacuum with atomic-scale precision, and the evolution of the electronic and spin-dependent properties can be investigated at different stages of fabrication. The long term technological impact of this work is in the areas of information storage, computing, optoelectronics, and flexible displays. The participation of graduate students, undergraduates, high school students and teachers in this cutting-edge materials research will provide education and training in high-technology areas which have been previously unavailable in the Inland Empire of Southern California. This project also leads the nascent electronic/magnetic/optical materials research effort at the rapidly growing UC Riverside campus through new coursework and research infrastructure development.The development of electronics in the latter half of the 20th century (which is responsible for computers, CD/DVD players, cell phones, etc.) is based on moving electrons from one location to another in an electronic circuit. In the last 15 years, scientific breakthroughs have enabled the "spinning" motion of electrons (similar to the rotation of a basketball) to be exploited for new technologies such as giant magnetoresistive read heads used in computers hard drives and multimedia applications. This new paradigm for electronics has come to be known as spintronics.This project develops new hybrid materials that combine traditional inorganic electronic materials (gallium arsenide, silicon, iron, etc.) with organic molecular films to take advantage of electron spin as never before possible in purely inorganic materials. This is a fascinating new direction for spin-based electronics research. These hybrid structures will be created by a process called molecular beam epitaxy in which materials are deposited atom-by-atom or molecule-by-molecule in an ultrahigh vacuum environment for the most well-controlled, highest purity materials and structures. The behavior of electrons and their spinning motion will be investigated using state-of-the-art optical and electronic tools. This research may lead to advances in computing, data storage, optoelectronics, and displays. The participation of graduate students, undergraduates, high school students and teachers in this cutting-edge materials research will provide education and training in high-technology areas which have been previously unavailable in the Inland Empire of Southern California. This project also leads the nascent electronic/magnetic/optical materials research effort at the rapidly growing UC Riverside campus through new coursework and research infrastructure development.