Serge and John Mangeri visit Argonne National Lab in the summer

This summer, John Mangeri participated in the highly selective Givens Associates program conducted by the Mathematics and Computer Science division at Argonne, working on the Ferret code development for more than two months. John’s main goal was to implement and test coupling among the polar, elastic and electrostatic degrees of freedom. This is now done, as shown in the picture below, which depicts an (exaggerated) elastic distortion in a 60 x 60 nm PbTiO3 plate with in-plane polar domains. Serge joined John at Argonne for a few weeks, providing mostly cheerleading support for the project.
image1coupled_60nm