Lattice Dynamics Studies of High-Pressure Phases Using Thermal Diffuse Scattering
- Event time: 1:00pm
- Event date: 1st March 2010
- Speaker: Jenny Jeppsson (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
Determining lattice dynamical behaviour at high pressure has never been straightforward. But the information is vital in understanding phase transitions and in determining elastic and thermodynamic properties.
A method to study lattice dynamics is to measure the phonon dispersion curves. It has traditionally been done with inelastic neutron scattering, but it can also be done with inelastic x-ray scattering or thermal diffuse scattering (TDS).
We are developing a method to study phonon dispersion curves for high pressure phases using TDS. In this method an experimental TDS intensity image is compared to a theoretical image, refining the theoretical model, which is used to calculate the dispersion curves.
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..