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，重点研究半导体中的自旋依赖现象。在研究部分：1；PI计划在自旋轨道耦合系统中发展一种自旋输运和积累理论，其中自旋操纵仅可以通过电手段实现。本研究包含自旋-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的目标是获得反常霍尔效应和反常输运的系统理论，在平等的基础上描述造成这种效应的外在和内在机制。本研究也将融合不同的方法，以解决微观和现象学方法所获得的矛盾结果。PI将致力于扩展稀磁半导体中的磁输运和磁光学理论，以包括纳米结构和混合系统，并探索隧道各向异性磁电阻等新现象。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，合并、进一步开发和评估几个物理范式模块课程。物理学范式课程由几个短的模块式课程组成，在大三期间教授，重点关注跨越物理学几个分支的关键范式。这可以让学生更好地将不同子领域的许多相互交织的想法联系起来。(2)由本科生参与小组研究项目。(3) PI将通过学生参与国际合作研究，包括访问国际实验小组，加强研究生教育。(4) PI计划开展外展活动，提高公众对自旋电子学及其对社会的广泛影响的认识，包括公开讲座和建立一个网站，从总体上描述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释磁性半导体研究社区的网站。非技术总结：该职业奖支持基础理论研究、教育和推广计划，重点研究半导体中涉及与电子相关的自旋的现象。特别是，PI将专注于旨在阐明电场如何驱动自旋输运的基本问题。PI的目的是阐明目前围绕解释实验的争议，其中电场被观察到驱动自旋电流在垂直于电场的方向。这一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——开辟了可能性，在这种设备中，它们的操作不仅取决于电子设备中的电子电荷，还取决于其自旋。PI还将研究磁性材料和稀释磁性半导体中涉及电子自旋和电荷输运的其他现象。稀释磁性半导体是经过掺杂使其含有磁性杂质的半导体。它们结合了磁铁和半导体的特性，是制造自旋电子器件的理想材料。基础研究本身是有趣和重要的，但也有助于新兴领域的自旋电子学的智力基础。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，合并、进一步开发和评估几个物理范式模块课程。物理学范式课程由几个短的模块式课程组成，在大三期间教授，重点关注跨越物理学几个分支的关键范式。这可以让学生更好地将不同子领域的许多相互交织的想法联系起来。(2)由本科生参与小组研究项目。(3) PI将通过学生参与国际合作研究，包括访问国际实验小组，加强研究生教育。(4) PI计划开展外展活动，提高公众对自旋电子学及其对社会的广泛影响的认识，包括公开讲座和建立一个网站，从总体上描述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释磁性半导体研究社区的网站。

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.