Combining Orders in Oxide Heterostructures
Gal Tuvia, Tel Aviv University
Yoram Dagan group
Ferroelectricity, ferromagnetism, and superconductivity are typically unrelated
phenomena due to their conflicting requirements. During my PhD, I focused on
combining such phenomena through interface design, where orders formed at the
constituent materials could overlap and interact. I will present two of my works that
explore this idea:
1. In the first work, a two-dimensional superconductor was realized on the
surface of a bulk ferroelectric crystal (Ca-substituted SrTiO 3 ). We show that
superconductivity can be tuned by switching ferroelectric polarization.
Moreover, the conducting interface constrained the polarization and domain
tiling near the surface of the ferroelectric material.
2. In the second work, we design a conducting interface between a ferroelectric
material and a thin magnetic layer of EuTiO 3 . We demonstrate that the
conducting layer residing at the interface is affected by both magnetic
scatterings and ferroelectric switching.
Combining such phenomena through interface design furthers our understanding of
unconventional superconductivity and multiferroic systems.
1. Tuvia, G., Frenkel, Y., Rout, P. K., Silber, I., Kalisky, B., & Dagan, Y. Ferroelectric Exchange Bias
Affects Interfacial Electronic States. Adv. Mater 2000216 (2020)
2. Tuvia, G., Weitz Sobleman, S., Sandik, S., Kalisky, B., & Dagan, Y. Tunable Magnetic Scattering
and Ferroelectric Switching at the LaAlO3/EuTiO3/Sr0.99Ca0.01TiO3 Interface. Phys. Rev.
Materials 6, 074408 (2022)