"Amorphous to Amorphous Transitions at High Pressure"

Chris Benmore, Argonne National Laboratory

Amorphous, melt and glassy structures usually require investigations with multiple probes to obtain a complete understanding of the atomic arrangements. Of these, x-ray diffraction is the most widely used and provides a solid benchmark for the study of high-pressure amorphous-amorphous and liquid-liquid transitions. It will be shown that the combination of high-pressure x-ray diffraction as well as density and Raman or acoustic measurements provides invaluable information on the interpretation of structure-property relations these inherently disordered systems. Future high-pressure x-ray beamlines should be designed with the possibility of including additional in situ measurement probes.