Acquisition of an Ultra-High Vacuum System to House a Scanning Tunneling Microscope

将建造两个用于扫描隧道显微镜的超高真空室。该系统将包括一个氩离子轰击炮、一个精密操纵器、一个负载锁定系统、泵站和一个隔离工作台。该设备将大大提高STM检查半导体表面和接口相关问题的能力。它将用于一个研究项目，包括以下主题：(i)原子弛豫和表面电子结构，（ii）金属-半导体界面，（iii）半导体表面的原子诱导弛豫和肖特基势垒形成，以及（iv）半导体和绝缘体的外延生长，例如，通过分子束外延生长的半导体异质结和半导体-氟化物界面。

Two ultra-high-vacuum chambers for a scanning tunneling microscope will be constructed. The system will include an Arion bombardment gun, a precision manipulator, a load-lock system, pumping stations and an isolation table. The equipment will greatly enhance the power of the STM to examine problems relevant to semiconductor surfaces and interfaces. It will be used in a program of research including the following topics: (i) atomic relaxation and surface electronic structure, (ii) metal- semiconductor interfaces, (iii) adatom-induced relaxation of semiconductor surfaces and Schottky barrier formation, and (iv) epitaxial growth of semiconductors and insulators, e.g., semiconductor heterojunctions and semiconductor-fluoride interfaces grown by molecular-beam epitaxy.