Femtosecond Spin Dynamics in Magnetic Semiconductor Quantum Structures

磁性半导体量子结构中的飞秒自旋动力学

• 批准号: 9207567
• 负责人: David Awschalom
• 金额: $ 45.5万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9207567&HistoricalAwards=false
• 关键词: Femtosecond; Spin; Dynamics; Magnetic; Semiconductor

The effects of reduced dimensionality an quantum confinement on fundamental magnetic and electronic spin dynamics are being investigated in quantum structures fabricated from II-VI diluted magnetic semiconductors (DMS). Magneto-optical spectroscopy probes spin-dependent phenomena such as carrier spin-flip scattering, spin dependent electronic tunneling and localization, magnetic polaron formation, and spin-lattice relaxation processes. The program combines state-of-the-art techniques in femtosecond optical measurements, integrated DCSQUID technology and epitaxial materials fabrication to obtain a real-timed view of dynamical behavior in quantum magnetic systems.

降维和量子限制对基本磁和电子自旋动力学的影响正在由 II-VI 稀释磁性半导体 (DMS) 制造的量子结构中进行研究。磁光光谱探测自旋相关现象，例如载流子自旋翻转散射、自旋相关电子隧道和定位、磁极化子形成和自旋晶格弛豫过程。 该项目结合了最先进的飞秒光学测量技术、集成 DCSQUID 技术和外延材料制造，以获得量子磁系统动态行为的实时视图。