Nature published our work on ultrathin freestanding oxide perovskites

Using water-soluble Sr₃Al2O₆ as the sacrificial buffer layer (a method developed by Prof. Harold Hwang's group), Dianxiang, Haoying and many students in our MBE group successfully synthesize ultrathin freestanding oxide perovskites (BiFeO₃ and SrTiO₃) by reactive molecular beam epitaxy. Via high resolution TEM, Songhua and other students from Prof. Peng Wang's group successfully confirm the high crystalline qualities of these freestanding oxide films.  The capability of synthesizing 2D oxide perovskites opens a new playground for the exploration of strongly correlated 2D phases and applications. [Nature 570 87–90 (2019)]

News & views by Yorick A. Birkhölzer & Gertjan Koster [Nature 570 39 (2019)]: 

2D crystalline membranes are easily made from some materials, but not from those with strong 3D lattices, such as technologically useful perovskite oxides. Free-standing perovskite monolayers have finally been made.