Anharmonic stabilization of ferrielectricity in CuInP${}_2$Se${}_6$

Nikhil Sivadas, Peter Doak, P. Ganesh

Using first-principles calculations and group-theory based models, we study the stabilization of ferrielectricity (FiE) in CuInP${}_2$Se${}_6$. We find that the FiE ground state is sta…