Many-Body Theory of Charge Transfer in Hyperthermal Atomic Scattering

9313856马斯顿电子多体过程在超热(大于热速度)原子与其散射表面之间的电荷转移中起着重要作用。多体关联是任何包括电子自旋、多电荷和激发原子态在内的动态电荷转移理论所固有的。这项建议关注于这些相关性，并试图对特定的真实系统进行建模。了解俄歇过程、电子-电子相互作用在原子和衬底中的作用以及现有模型及其系统解决方案的局限性是需要解决的一些主要问题。要研究复杂的(比碱金属更复杂)撞击原子，如氧和半导体目标表面。这项工作对理解表面的相互作用具有直接意义--例如原子和分子的辉光轰击轨道上的航天飞机。它涉及高能原子如何从表面散射的多体描述。这项工作利用场论中的最新创新来处理这些动态的强关联电子系统。该提案涉及处理非平凡的撞击原子和非平凡的表面--这里的限定词意味着它们的电子结构必须用复杂的方法处理。***

9313856 Marston Electronic many-body processes play an important role in charge transfer between hyperthermal (greater than thermal velocity) atoms and the surfaces off which they scatter. Many-body correlations are intrinsic to any theory of dynamical charge transfer which includes electron spin, multiple charge and excited atomic states. This proposal focusses on these correlations and tries to model specific real systems. Understanding the roles of Auger processes, electron-electron interactions in the atom and the substrate and the limitations of present models and their systematic solution are some of the principal problems to be addressed. Complicated (more complex than alkali metal) impinging atoms such as oxygen and semiconducting target surfaces are to be studied. %%% This work has direct significance in the understanding of interactions at surfaces - eg the glow of atoms and molecules bombarding the space shuttle in orbit. It concerns the many-body description of how high energy atoms scatter off surfaces. The work makes use of recent innovations in field theory to deal with these dynamical strongly correlated electronic systems. The proposal concerns treating non-trivial impinging atoms and non-trivial surfaces - where the qualifiers here mean that their electronic structure has to be handled by sophisticated methods. ***