Nonequilibrium Transport in Very High Landau Levels of Quantum Hall Systems

量子霍尔系统极高朗道能级中的非平衡输运

• 批准号: 1309578
• 负责人: Michael Zudov
• 金额: $ 39万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1309578&HistoricalAwards=false
• 关键词: Nonequilibrium; Transport; Very; Landau; Levels

****Technical Abstract****This project will experimentally investigate electronic properties of GaAs-based semiconductor nanostructures which are driven out of their equilibrium state by microwave radiation or dc electric fields. In particular, electrical resistance of such a device can oscillate drastically with the applied magnetic field and even vanish under certain conditions. By exploring similarities and differences between microwave- and dc field-induced effects, the project will develop a method to obtain detailed information on the correlation properties of the disorder potential, which will have a direct impact on other fields, such as high-mobility MBE growth. The educational component of this project rests on the development of research-based educational resources and direct involvement of students at all levels and from a variety of backgrounds in cutting-edge research to ready them for careers in nanotechnology industry, government, and academe. ****Non-Technical Abstract****Understanding electronic properties of semiconductor quantum devices becomes increasingly important as miniaturization of modern integrated circuits approaches a point where quantum effects come into play. This project will experimentally investigate electronic properties of semiconductor nanostructures, which are driven out of their equilibrium state by microwave radiation or dc electric fields. In particular, electrical resistance of such a device can oscillate drastically with the applied magnetic field and even vanish under certain conditions. By exploring similarities and differences between microwave- and dc field-induced effects, the project will develop a method to obtain detailed information on the amount and type of impurities in the device, which will have a direct impact on other fields, such as epitaxial growth of high-purity semiconductor nanostructures. The educational component of this project rests on the development of research-based educational resources and direct involvement of students at all levels and from a variety of backgrounds in cutting-edge research to ready them for careers in nanotechnology industry, government, and academe.

****技术摘要****本项目将实验研究微波辐射或直流电场驱动下gaas基半导体纳米结构的电子特性。特别是，这种器件的电阻可以随着外加磁场剧烈振荡，甚至在某些条件下消失。通过探索微波和直流场诱导效应之间的异同，该项目将开发一种方法来获得无序势相关特性的详细信息，这将对其他领域产生直接影响，例如高迁移率的MBE生长。该项目的教育部分依赖于以研究为基础的教育资源的发展，以及来自各种前沿研究背景的各级学生的直接参与，为他们在纳米技术行业、政府和学术界的职业生涯做好准备。****非技术摘要****随着现代集成电路的小型化，了解半导体量子器件的电子特性变得越来越重要，量子效应开始发挥作用。本计画将实验研究半导体奈米结构在微波辐射或直流电场下被逐出平衡态时的电子特性。特别是，这种器件的电阻可以随着外加磁场剧烈振荡，甚至在某些条件下消失。通过探索微波和直流场致效应之间的异同，该项目将开发一种方法来获得器件中杂质的数量和类型的详细信息，这将对其他领域产生直接影响，例如高纯度半导体纳米结构的外延生长。该项目的教育部分依赖于以研究为基础的教育资源的发展，以及来自各种前沿研究背景的各级学生的直接参与，为他们在纳米技术行业、政府和学术界的职业生涯做好准备。