Many-Body Effects in Charge-Transfer Processes at Metal Surfaces

金属表面电荷转移过程中的多体效应

• 批准号: 9521444
• 负责人: Peter Nordlander
• 金额: $ 14.4万
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-15 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521444&HistoricalAwards=false
• 关键词: Many; Body; Effects; Charge; Transfer

9521444 Nordlander The objective of this research program is to increase the understanding of charge transfer phenomena between atoms and simple molecules, and metal surfaces. The Principal Investigator will develop and apply a dynamical many-body method, based on Green's functions, in which he calculates the charge transfer probabilities by solving a set of coupled integro-differential equations. The project includes an investigation of the influence of substrate temperature, particle velocity, atomic and molecular level degeneracy, substrate band width, and substrate density of states on charge transfer. The results of this project provide the theoretical background for an accurate description of charge-transfer processes in atom/molecule- surface collisions. This formalism helps to interpret specific experimental results and to relate microscopic properties of the surface to actual experimental data. %%% This project develops of theory of the scattering and colliding of atoms or molecules with metal surfaces. The main focus is on the transfer of charge between the surface and the colliding particle. Part of the project involves the development of the complex quantum theory that one needs to properly describe these collisions. The project includes an investigation of the influence of a variety of properties of both the substrate and the colliding particle on charge transfer. This formalism helps to interpret specific experimental results and to relate microscopic properties of the surface to actual experimental data. Such scattering events are a primary way to measure various physical properties of surfaces, the knowledge of which is necessary to develop new and better materials. ***

这个研究项目的目的是增加对原子、简单分子和金属表面之间电荷转移现象的理解。首席研究员将开发并应用基于格林函数的动态多体方法，通过求解一组耦合积分-微分方程来计算电荷转移概率。该项目包括调查衬底温度、粒子速度、原子和分子水平简并、衬底带宽和衬底状态密度对电荷转移的影响。该项目的研究结果为准确描述原子/分子表面碰撞中的电荷转移过程提供了理论背景。这种形式有助于解释具体的实验结果，并将表面的微观特性与实际实验数据联系起来。这个项目发展了原子或分子与金属表面的散射和碰撞理论。主要的焦点是在表面和碰撞粒子之间的电荷转移。项目的一部分涉及复杂量子理论的发展，人们需要正确地描述这些碰撞。该项目包括研究衬底和碰撞粒子的各种特性对电荷转移的影响。这种形式有助于解释具体的实验结果，并将表面的微观特性与实际实验数据联系起来。这种散射事件是测量表面各种物理性质的主要方法，对开发新的和更好的材料是必要的。＊＊＊