Far Infrared and Microwave Magneto-Optical Studies of Strongly Correlated Electronic Systems

强相关电子系统的远红外和微波磁光研究

• 批准号: 9223217
• 负责人: H. Dennis Drew
• 金额: $ 32万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1997-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223217&HistoricalAwards=false
• 关键词: Far; Infrared; Microwave; Magneto; Optical

This research concerns far infrared and microwave magneto-optical studies of type II superconductors and semiconductor heterostructures. A systematic investigation of vortex core excitation resonance and the magneto-optical activity of type II superconductors will be made. The goal is to gain an understanding of high temperature superconductors and vortex dynamics in general. The magneto-optical studies will look for direct evidence for cyclotron resonance and optical activity and search for helicon propagation and the ac Hall effect in superconductors. These investigations will break new ground in superconductivity research and hold the promise of opening new paths for the science and technology of superconductors. The work on semiconductor heterostructures will be directed toward the study of the low lying collective excitations in low dimensional electron systems. The goal of these studies is to elucidate electron correlation effects in these strongly interacting systems. Magneto-optical and magneto-transport studies will be carried out. These studies may lead to the discovery of novel condensed phases such as the Wigner crystal or new correlated liquid phases in 3D or quasi 3D electron systems. The infrared techniques will also be used to study magneto plasmons in 2 dimensional electron systems. In this case the interest is the observation and study of the magneto-rotons associated with the fractional quantum Hall effect. %%% This research concerns fundamental studies of superconductors and semiconductor heterostructures in high magnetic fields. The studies on superconductors are directed toward improving the understanding of the electrodynamics of these materials at microwave and infrared frequencies. They are based on the recent observation of new magneto-optical effects in these materials and will be systematically studied in both high temperature superconductors and in conventional superconductors. These studies are likely to break new ground in superconductivity research and they hold the promise of opening new paths for the science and technology of superconductors. The work on semiconductor heterostructures will be directed toward the investigation of collective excitations in low dimensional electron systems. The goal of these studies is to elucidate electron correlation effects in these strongly interacting electron systems. Magneto-optical and magneto-transport studies will be carried out and may lead to the discovery of novel condensed pahses in electron systems. The program involves collaboration with both industrial and government laboratories.

本研究涉及远红外和微波磁光 第二类超导体和半导体研究 异质结构 涡核的系统研究 激发共振和II型磁光活性 超导体将被制造出来。 我们的目标是了解 高温超导体和涡旋动力学的研究。 磁光研究将寻找直接证据， 回旋共振和旋光性以及寻找螺旋子 传播和交流霍尔效应在超导体。 这些 研究将在超导研究中开辟新天地 并承诺为科学开辟新的道路 超导体技术。 半导体异质结构的工作将针对 低层大气中低层集体激发的研究 三维电子系统 这些研究的目的是 阐明电子相关效应在这些强烈 互动系统 磁光和磁输运研究 将被执行。 这些研究可能会发现 新的凝聚相，如维格纳晶体或新的相关 3D或准3D电子系统中的液相。 红外 技术也将用于研究磁等离子体激元在2 三维电子系统 在这种情况下，利息是 与之相关的磁旋子的观测和研究 分数量子霍尔效应 %%% 这项研究涉及超导体的基础研究， 高磁场下的半导体异质结构。 的 对超导体的研究是为了提高 了解这些材料的电动力学， 微波和红外频率。 它们是基于最近 在这些材料中观察到新的磁光效应， 将系统地研究在高温和 超导体和常规超导体。 这些研究 很可能在超导研究中开辟新天地， 他们有希望为科学开辟新的道路， 超导体技术。 半导体方面的工作 异质结构将直接对调查 低维电子系统中的集体激发。 的 这些研究的目的是阐明电子关联效应 在这些强相互作用的电子系统中。 磁光 和磁输运研究将进行，并可能导致 电子系统中新凝聚相的发现。 的 该计划涉及与工业和政府的合作 laboratories.