Date:
Sun, 18/12/202212:15
Location:
Seminar Hall, Los Angeles Building, entrance floor
Dr. Moshe Ben Shalom
School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
We present a polar layered system with distinct ladder-like polarization steps that accumulate with each extra atomic layer. Interestingly, the symmetries of these diatomic crystals translate planar shifts by one interatomic spacing to the out-of-plane switching of the structure and its polarization. I will discuss the origin of this ultimately thin interfacial polarization, the unique cumulative response at the atomic limit, the robust co-existence with in-plane conductivity, and the switching dynamics observed in our experiments and modeled by our first principle calculations.