Experimental Study of Two Dimensional Electron Layers

二维电子层的实验研究

• 批准号: 9401561
• 负责人: Eva Andrei
• 金额: $ 31万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-01 至 1997-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401561&HistoricalAwards=false
• 关键词: Experimental; Study; Two; Dimensional; Electron

9401561 Andrei Technical abstract: Electrons on a helium substrate form a two dimensional electron system. This system will be investigated in a region of the phase diagram where correlations between electrons determine the in-plane and out-of-plane dynamics. The experiments focus on (a) the phase boundary of the electron crystal and how it is affected by screening; (b) the interplay between the electron crystal and Landau quantization in the presence of a perpendicular magnetic field; (c) the effects of crystal correlations on tunneling; (d) the effect of the Landau quantization on magneto-tunneling rates. Non-technical abstract: Electrons captured on a thin layer of helium at very low temperatures form a two dimensional system which can serve as a prototype system for the study of electron states in more conventional states of condensed matter. The key task required for realizing a case in which very many electrons are clustered on the helium film is to reduce significantly the impurities and roughness of the underlying solid on which the helium film is deposited. This project will focus on utilizing ultra clean and ultra smooth solid substrates in order to achieve such a high density of electrons which has not been previously achieved. This high electron density will allow search of as yet undiscovered effects which will be important to the electron on helium problem in particular, but also to other two dimensional electron systems in general. ***

小行星9401561 技术摘要： 氦衬底上的电子形成二维电子系统。 该系统将在相图的区域中进行研究，其中电子之间的相关性决定了平面内和平面外的动力学。 实验的重点是：（a）电子晶体的相界，以及它是如何受到屏蔽的影响;（B）在垂直磁场的存在下，电子晶体和朗道量子化之间的相互作用;（c）晶体相关性对隧穿的影响;（d）磁隧穿率的朗道量子化的影响。 非技术摘要：在非常低的温度下在薄的氦层上捕获的电子形成二维系统，该系统可以作为研究凝聚态物质的更常规状态中的电子状态的原型系统。 实现非常多的电子聚集在氦膜上的情况所需的关键任务是显著减少其上沉积氦膜的底层固体的杂质和粗糙度。 该项目将专注于利用超清洁和超光滑的固体基板，以实现以前从未实现过的如此高的电子密度。 这种高电子密度将允许搜索尚未发现的效应，这将是重要的电子对氦的问题，特别是，但也对其他二维电子系统一般。 ***