"Interplay between lattice, spin, orbital and charge orders in bulk and layered
ABO3 perovskites"
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Ferroelectricity in ABO3 perovskites and related compounds has been a topic of
intensive research for more than 60 years. Recently, the coupling of the
ferroelectric mode with other structural distortions has attracted an increasing
interest since it offers promising and still widely unexplored possibilities to
couple ferroelectricity with other functional properties and even to produce
unusual phenomena. In this context, the trilinear coupling between ferroelectric
and oxygen rotational modes in naturally-occuring and artificial layered
perovskites emerged as a practical way to produce unusual dielectric properties
or to achieve enhanced magneto-electric coupling. Focusing on titanate and
vanadate systems, we will discuss here how even more exciting new phenomena can
appear when additional orbital and charge orders enter into play!