Phonon Emission From a Hot Two-Dimensional Electron Gas

热二维电子气的声子发射

• 批准号: 8701628
• 负责人: Madsen Jim
• 金额: $ 3.57万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1989-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8701628&HistoricalAwards=false
• 关键词: Phonon; Emission; Hot; Two; Dimensional

Phonon Emission From a Hot Two-Dimensional Electron Gas This award recommendation is made under the U.S.-Industrialized Countries Program for the Exchange of Scientists and Engineers, 1987/1988 Competition. The program is designed to enable U.S. scientists and engineers to conduct long-term research at research institutions in the industrialized countries of Western Europe as well as Japan, Australia, and New Zealand. Exchange awards provide opportunities for the conduct of joint research and the utilization of unique or complementary facilities, expertise and experimental conditions in foreign countries. Awards are selected on the basis of scientific criteria relevant to his/her field of science, the prospective potential of the applicants for professional growth, as well as criteria relevant to the furthering of international cooperation in science and engineering. The program is particularly directed to scientists and engineers who are embarking on their research careers. This research project addresses questions of the measurements on the nature of the phonons emitted from a hot two-dimensional electron gas contained in semiconductor devices at low temperatures. Under these conditions, the principal energy loss is by acoustic phonon emission. The research is of interest because the much higher electron mobility in these devices should lead to well defined cyclotron frequencies as well as providing an opportunity to examine effects associated with cutoffs in the phonon-wave vector. The project is under the direction of Dr. James M. Madsen, Department of Physics, Colorado School of Mines, Golden CO 80401, U.S.A., and Professor L.J. Challis, Department of Physics, The University of Nottingham, University Park, Nottingham NG7 2 RD, England. This award recommendation provides funds to cover, as appropriate, international travel, local travel abroad, stipend, dependents allowance, if applicable, language training, if required, and a flat administrative allowance of $250 or the U.S. home institution.

热二维电子气体中的声子发射本奖项是在美国-工业化国家科学家和工程师交流计划1987/1988竞赛下提出的。该项目旨在使美国科学家和工程师能够在西欧工业化国家以及日本、澳大利亚和新西兰的研究机构进行长期研究。交换奖为进行联合研究和利用国外独特或互补的设施、专门知识和实验条件提供了机会。奖项的评选依据是与其科学领域相关的科学标准、申请人专业发展的前景潜力，以及与促进国际科学与工程合作有关的标准。该项目特别针对正在从事研究工作的科学家和工程师。本研究项目解决了在低温下半导体器件中含有的热二维电子气体所发射的声子性质的测量问题。在这些条件下，主要的能量损失是声子发射。这项研究是有趣的，因为在这些设备中更高的电子迁移率应该导致良好定义的回旋加速器频率，以及提供一个机会来检查与声子波矢量中的截止相关的影响。该项目由科罗拉多矿业学院物理系James M. Madsen博士（美国Golden CO 80401）和英国诺丁汉大学物理系L.J. Challis教授（诺丁汉大学公园，诺丁汉NG7 2 RD）指导。该奖励建议提供资金，酌情支付国际旅行，国外本地旅行，津贴，家属津贴（如果适用），语言培训（如果需要），以及250美元的固定行政津贴或美国家庭机构。