Ballistic Spin Transport in 2D Carrier Systems

自旋电子学是固体科学与工程中的一个新兴领域。 它的广泛目标是利用载流子的自旋来实现依赖于自旋和自旋电流的产生、操纵和检测的新型电子器件。 如果成功的话，这种对自旋的操纵也会对另一个新兴的、甚至更奇特的量子计算领域产生影响，因为自旋是在拟议的量子计算机中记录量子信息比特的主要候选者。该项目的目标是探索AlAs量子威尔斯中清洁的二维载流子系统中的弹道自旋输运，由于其大的有效g因子，电子可以在适度的磁场（~ 1 T）下自旋极化。该项目涉及通过分子束外延生长基本材料的晶体，利用光学和电子束光刻技术制造各种装置，以及运输测量，该项目包括一个高质量和全面的教育部分。 PI致力于研究生和本科生的教育，该项目将导致学生在关键的，最先进的科学和技术领域的教育，包括高质量分层半导体结构的制造，表征和物理。 PI还致力于在科学和工程方面更广泛地教育公众。 他参加了各种K-12教师培训计划在电力和磁力，一般领域都与本建议的主题。 这些方案包括培训课程、工具包开发和在地区学校的示范。

Spintronics is an emerging area in solid state science and engineering. Its broad goal is to utilize carriers' spin to realize novel electronic devices that rely on the creation, manipulation, and detection of spin and spin-currents. If successful, such manipulation of spins can also have impact on another emerging, and perhaps even more exotic, field of quantum computing, as spin is the leading candidate for registering the quantum bit of information in the proposed quantum computers. The goal of this project is to explore ballistic spin transport in clean, two-dimensional carrier systems in AlAs quantum wells where, thanks to their large effective g-factor, the electrons can be spin-polarized with a modest magnetic field (~ 1T). The project involves the crystal growth of the basic materials, via molecular beam epitaxy, the fabrication of various devices using optical and electron-beam lithography, and transport measurements.The project incorporates a high quality and comprehensive educational component. The PI is dedicated to the education of both graduate and undergraduate students, and the project will result in the education of students in critical, state-of-the art areas of science and technology, including the fabrication, characterization, and physics of high quality layered semiconductor structure. The PI is also committed to a broader education of the public in science and engineering. He participates in various K-12 teacher training programs in electricity and magnetism, general areas that are linked to the topic of this proposal. The programs include training sessions, kit development, and demonstrations at regional schools.