CAREER: Electron Drag Measurements: A New Approach to Physics in Electron Systems

职业：电子阻力测量：电子系统物理学的新方法

• 批准号: 9503080
• 负责人: Thomas Gramila
• 金额: $ 22.5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9503080&HistoricalAwards=false
• 关键词: CAREER; Electron; Drag; Measurements; New

9503080 Gramila Fundamental aspects of electronic properties of semiconductors are to be studied in a set of experiments utilizing a powerful new measurement technique. The focus of the measurements is electron- electron interactions, which can be directly measured with the new technique. Measurements will explore the influence of disorder on electron systems in detail. The goal is to isolate for the first time a central physical element of disorder induced effects: correlations between electrons. Other fundamental issues to be addressed include electron screening, examined through direct experimental measurement of corrections to random phase approximation screening calculations. The relevance of the issues explored in these measurements extends to virtually all electronic systems, from conventional semiconductors to new reduced dimensionality systems. %%% The properties of metals and semiconductors can be fundamentally altered by interaction between the electrons present in these systems. A new measurement technique, which provides direct and unambiguous measurement of these otherwise elusive interactions, permits new approaches to important questions in these materials. The influence of disorder on electronic properties is one area to be explored in detail. Another area is the degree to which the electrons collectively shield themselves from external forces and voltages, a complex phenomena notoriously difficult to calculate directly. The relevance of the issues explored in these measurements extends to virtually all electronic systems, from conventional semiconductors to new nanostructured materials. ***

9503080 Gramila半导体电子特性的基本方面将在一组实验中利用强大的新测量技术进行研究。测量的重点是电子-电子相互作用，这可以直接测量的新技术。测量将详细探索无序对电子系统的影响。目标是首次分离出无序诱导效应的一个中心物理元素：电子之间的相关性。其他要解决的基本问题包括电子屏蔽，检查通过直接实验测量校正随机相位近似屏蔽计算。 在这些测量中探索的问题的相关性延伸到几乎所有的电子系统，从传统的半导体到新的降维系统。 金属和半导体的性质可以通过这些系统中存在的电子之间的相互作用而从根本上改变。 一种新的测量技术，它提供了直接和明确的测量这些否则难以捉摸的相互作用，允许新的方法来解决这些材料中的重要问题。无序对电子性质的影响是一个有待详细探讨的领域。另一个领域是电子集体屏蔽自己免受外力和电压影响的程度，这是一种非常复杂的现象，很难直接计算。在这些测量中探讨的问题的相关性延伸到几乎所有的电子 系统， 从常规 半导体 到 新型纳米结构材料 ***