Emerging phenomena from exotic ferroelectric topological states

In the past decade, a series of breakthrough discoveries in new exotic polar topological states have been witnessed, e.g., vortex, skyrmion, and meron. These tantalizing findings open a new avenue toward a plethora of emerging physical phenomena and offer opportunities for a wide range of future configurable electronic devices, which might eventually lead to an exciting area, the so-called “topotronics.” Although this field has seen a rapid progress, especially in revealing various novel topological states, the associated emerging phenomena and functionalities as well as application potentials yet remain largely unexplored, which might become fruitful areas in the upcoming years and thus deserve more attention. In this perspective, we give a brief overview on the recent advances in the field of exotic polar topological states, highlighting the emerging phenomena and efforts to control these functional topological objects. Finally, we present a concluding summary with some suggestions for future directions.