Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Scanning Tunneling Microscopy Studies of Semiconductor Surfaces

Jenny MacLeod
Department of Physics, Queen's University

Monday, October 28, 2002
1:30 PM @ Stirling A

Abstract:

Since its conception almost 25 years ago, the scanning tunneling microscope (STM) has become a ubiquitous tool in the study of surfaces. Local probe characterization via STM has revolutionized the understanding of surface systems in terms of atom-resolved topographic and electronic information. As current technology continues its drive towards atomic-scale integrated circuit components, the information provided by STM is moving from the realm of surface science to the arena of application in technology. The NanoPhysics STM is a novel home-built instrument capable of resolving individual atoms on semiconductor surfaces. The design and performance of two generations of STMs will be described, and representative results will demonstrate the instrument's capability for imaging, electronic characterization and interaction with surfaces. The motivation for new research focused on studying metal overlayer structures on semiconductor surfaces will also be discussed.