Ladder Ferroelectrics by vdW Sliding

Date: 
Sun, 18/12/202212:15
Location: 
Seminar Hall, Los Angeles Building, entrance floor

Moshe ben shalomDr. Moshe Ben Shalom

School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel

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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.