Highly Polarizable Semiconductors and Universal Origin of Ferroelectricity in Materials with a Litharge-Type Structural Unit

Ziye Zhu, Jiaming Hu, Yubo Yuan +3

We discover that a large family of [Pb${}_2$F${}_2$]- and [Bi${}_2$O${}_2$]-based mixed-anion materials with a litharge-type structural unit are highly polarizable layered semiconductors o…