Experimental Studies of Intrinsic Surface Electronic and Magnetic Properties

该计划的总体科学目标是发现和研究与晶体/真空界面处晶格突然终止相关的物理现象，以及与晶体外延层界面和外延多层结构相关的类似现象。具体的物理现象包括电子表面态、弛豫和重构、表面筛选和核心能级位移以及表面晶体场效应，这些都是表面和界面特性的表现。这些现象是用各种实验技术来研究的，这些实验技术对结构（低能电子衍射）、成分（俄歇电子能谱）、电子性质（同步辐射角分辨光电子发射）和磁性（磁光和自旋极化技术）都很敏感。实验研究与类似性质的理论/数值工作进行协调。该项目解决了具有重要技术意义的基本问题，特别是基于这些磁性薄膜的信息存储。

The general scientific objective of this program is to discover and investigate physical phenomena associated with the abrupt termination of a crystal lattice which occurs at a crystal/vacuum interface, and similar phenomena associated with crystal expitaxial layer interfaces and with epitaxial multilayer structures. Specific physical phenomena which are manifestations of intrinsic surface and interface properties include electronic surface states, relaxation and reconstruction, surface screening and core level shifts and surface crystal field effects. These phenomena are studied using a variety of experimental techniques which are sensitive to structure (low energy electron diffraction), composition (Auger electron spectroscopy), electronic properties (angle resolved photoelectron emission with synchrotron radiation) and magnetic properties (magneto-optical and spin-polarization techniques). The experimental studies are carried out and coordinated with theoretical/numerical work of a similar nature. This project addresses fundamental issues having important technological significance, specifically in relation to information storage based on these magnetic films.