Studying the Nano-scale Kinetics of Radiation Damaged Surfaces
- Event time: 1:00pm
- Event date: 18th February 2013
- Speaker: Terri Amos (Formerly School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Reflection Anisotropy Spectroscopy (RAS) is a surface specific optical probe used to measure the anisotropy of electronic surface states of crystals. In the RAS spectra of the Cu(110) surface the 2.1eV peak has been identified to be particularly sensitive to surface defects whilst unaffected by the bulk of the substrate. This sensitivity can be explained using the Poelsema-Comsa model, where surface electrons are scattered by defects, destroying the local surface electron states. By employing this model in combination with MD results in a kinetic Monte Carlo simulation, we have simulated both RAS spectra and STM images of an ion bombarded Cu(110) surface. In this talk I will present the results of these simulations for Cu(110) at 144K as well as some preliminary results of a more complex simulation at higher temperatures, where additional kinetic processes have to be considered.
This is a weekly series of informal talks given primarily by members of the soft condensed matter and statistical mechanics groups, but is also open to members of other groups and external visitors. The aim of the series is to promote discussion and learning of various topics at a level suitable to the broad background of the group. Everyone is welcome to attend..