Our research program focuses on understanding the large-scale physical and chemical behavior of the Earth and other planets through experimental study of geological materials under extreme conditions of pressure and temperature. More generally, we use the laser-heated diamond anvil cell together with optical spectroscopy and x-ray techniques to explore crystal structures, phase relations, elasticity, and deformation behavior in a wide range of materials at ultra-high pressure and temperature conditions.
We use Brillouin spectroscopy in the diamond anvil cell to measure elastic wave velocities at high pressures and temperatures and use the results to construct compositional models for Earth’s interior. We also study sound velocities in a range of single crystal materials to examine anisotropic elasticity, interatomic interactions, mechanical properties, compressibility, and phase transition mechanisms.
In recent years, we have examined the equation of state, phase boundaries, chemical substitution effects, and deformation behavior of a range of compounds that adopt this structure.