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

9521444诺德兰德这项研究计划的目的是增加对原子和简单分子之间以及金属表面之间电荷转移现象的了解。首席研究人员将开发和应用一种基于格林函数的动力学多体方法，其中他通过求解一组耦合的积分-微分方程组来计算电荷转移概率。该项目包括研究衬底温度、粒子速度、原子和分子能级简并度、衬底带宽和衬底态密度对电荷转移的影响。该项目的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基础。这种形式主义有助于解释特定的实验结果，并将表面的微观性质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。主要的焦点是表面和碰撞粒子之间的电荷转移。该项目的一部分涉及开发复杂的量子理论，人们需要该理论来适当地描述这些碰撞。该项目包括研究衬底和碰撞粒子的各种性质对电荷转移的影响。这种形式主义有助于解释特定的实验结果，并将表面的微观性质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属性的主要方法，了解这些属性对于开发新的和更好的材料是必要的。***

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. ***