CAREER: Spin Dependent Phenomena in Semiconductors

技术概述：该职业奖支持理论研究、教育和推广计划，重点是研究半导体中的自旋依赖现象。在研究部分：1.PI计划发展自旋-轨道耦合系统中的自旋输运和积累理论，在该系统中，自旋操纵完全可以通过电子手段实现。这项研究包括自旋霍尔效应，将解决诸如无序散射、广义漂移扩散方程和相互作用效应等关键问题。PI将使用几种方法，在不同的长度尺度上结合分析和计算技术。PI的目的是获得一个系统的关于反常霍尔效应和反常输运的理论，在平等的基础上描述导致这种效应的外部和内部机制。这项研究还将合并不同的方法，以解决微观方法和现象学方法所获得的矛盾结果。PI将致力于将稀磁半导体中的磁输运和磁光理论扩展到包括纳米结构和混合系统，并探索新的现象，如隧道各向异性磁阻。教育和推广部分有四个重点：(1)PI将与俄勒冈州立大学的开发人员协调，整合、进一步开发和评估几种物理模块课程的范例。物理范例课程由几个短小的模块式课程组成，在初一教授，重点放在跨越物理几个分支的关键范例上。这使学生能够更好地将不同子领域的许多相互交织的想法联系起来。(2)PI将让本科生参与小组研究项目。(3)通过学生参与国际合作研究，包括参观国际实验小组，促进研究生教育。(4)国际自旋协会计划开展推广活动，以提高公众对自旋电子学及其在社会中的广泛影响的认识，包括公开讲座和开发一个网站，从总体上介绍TAMU的自旋电子学研究。此外，还将进一步开发一个专门用于稀磁半导体研究界的网站。非技术总结：这个职业奖项支持基础理论研究，以及一个教育和推广计划，该计划专注于研究半导体中涉及与电子相关的自旋的现象。特别是，PI将专注于基本问题，旨在阐明电场如何驱动自旋的输运。PI旨在阐明围绕实验解释的电流争议，在该实验中，观察到电场在垂直于电场的方向上驱动自旋电流。这种现象提供了利用电场操纵电子自旋的可能性，并为新的电子设备--自旋电子设备--打开了可能性，在这种设备中，它们的运行不仅取决于电子设备中的电子电荷，而且取决于电子设备的自旋。PI还将研究与磁性材料和稀磁半导体中的电子、自旋和电荷传输有关的其他现象。稀磁半导体是掺杂后含有磁性杂质的半导体。它们结合了磁体和半导体的特性，是很有前途的自旋电子器件材料。基础研究本身是有趣和重要的，但也为新兴的自旋电子学领域的知识基础做出了贡献。教育和外联部分有四个重点：(1)PI将与俄勒冈州立大学的开发人员协调，纳入、进一步开发和评估物理模块课程的几种范例。物理范例课程由几个短小的模块式课程组成，在初一教授，重点放在跨越物理几个分支的关键范例上。这使学生能够更好地将不同子领域的许多相互交织的想法联系起来。(2)PI将让本科生参与小组研究项目。(3)通过学生参与国际合作研究，包括参观国际实验小组，促进研究生教育。(4)国际自旋协会计划开展推广活动，以提高公众对自旋电子学及其在社会中的广泛影响的认识，包括公开讲座和开发一个网站，从总体上介绍TAMU的自旋电子学研究。此外，还将进一步开发一个专门用于稀磁半导体研究界的网站。

TECHNICAL SUMMARY:This CAREER award supports theoretical research, and an education, and outreach program that focuses on the study of spin-dependent phenomena in semiconductors. In the research component:1. The PI plans to develop a theory of spin transport and accumulation in spin-orbit coupled systems where spin manipulation is possible solely by electrical means. This study, which encompasses the spin-Hall effect, will address key issues such as disorder scattering, generalized drift-diffusion equations, and interaction effects. The PI will use several approaches that combine analytical and computational techniques at different length scales.2. The PI aims to obtain a systematic theory of the anomalous Hall effect and anomalous transport that describes on an equal footing both extrinsic and intrinsic mechanisms responsible for the effect. This study will also merge different approaches to resolve the contradictory results obtained through microscopic and phenomenological approaches.3. The PI will work to extend the theory of magneto-transport and magneto-optics in diluted magnetic semiconductors to include nanostructures and hybrid systems and explore new phenomena such as tunneling anisotropic magneto-resistance.The educational and outreach component has four foci: (1) The PI will incorporate, further develop, and assess several Paradigms of Physics module courses in coordination with their developers at Oregon State University. The Paradigms of Physics program consists of several short module-like-courses, taught during the junior year, that focus on key paradigms that cut across several branches of physics. This allows students to better connect many interwoven ideas in different subfields. (2) The PI will involve undergraduates in the groups research projects. (3) The PI will enhance graduate education through student participation in international collaborative research, including visits to international experimental groups. (4) The PI plans to develop outreach activities to increase public awareness of spintronics and its broad impact in society, including public lectures and the development of a website describing spintronics research at TAMU at a general level. In addition a website dedicated to the specialized diluted magnetic semiconductor research community will be further developed. NON-TECHNICAL SUMMARY:This CAREER award supports fundamental theoretical research, and an education, and outreach program that focuses on the study of phenomena in semiconductors involving the spin associated with electrons. In particular the PI will focus on fundamental questions aiming to elucidate how electric fields can drive the transport of spin. The PI aims to elucidate current controversies surrounding the interpretation of experiments in which an electric field is observed to drive a spin current in a direction perpendicular to the electric field. This phenomenon offers the potential to manipulate electron spin with an electric field and opens possibilities for new electronic devices, spintronic devices, in which their operation depends not only on the electron charge, as in an electronic device, but also on its spin. The PI will also study other phenomena involving the transport of electron spin and charge in magnetic materials and in diluted magnetic semiconductors. Diluted magnetic semiconductors are semiconductors that are doped so that they contain magnetic impurities. They combine the properties of magnets and semiconductors and are promising materials for spintronic devices. The fundamental research is interesting and important in its own right, but also contributes to the intellectual foundations of the emerging field of spintronics. The educational and outreach component has four foci: (1) The PI will incorporate, further develop, and assess several Paradigms of Physics module courses in coordination with their developers at Oregon State University. The Paradigms of Physics program consists of several short module-like-courses, taught during the junior year, that focus on key paradigms that cut across several branches of physics. This allows students to better connect many interwoven ideas in different subfields. (2) The PI will involve undergraduates in the groups research projects. (3) The PI will enhance graduate education through student participation in international collaborative research, including visits to international experimental groups. (4) The PI plans to develop outreach activities to increase public awareness of spintronics and its broad impact in society, including public lectures and the development of a website describing spintronics research at TAMU at a general level. In addition a website dedicated to the specialized diluted magnetic semiconductor research community will be further developed.