Self-organization nanodomain structure in ferroelectric ultrathin films

摘要

Through ab initio-based simulations of the perovskite ferroelectric ultrathin films, we find that on applying an external electric field, ferroelectric ultrathin films can form kinds of self-organization nanodomain patterns including concentric loop stripes and nanodomain lattices. The characteristic size of the domain structure can be conveniently adjusted by controlling the film thickness and field, which should be very attractive in many applications. Our results are helpful for understanding the difference between the ferroelectric ultrathin film and bulk.