Epitaxy of hexagonal ABO₃ quantum materials

Hexagonal ABO 3 oxides ( A, B = cation) are a class of rich materials for realizing novel quantum phenomena. Their hexagonal symmetry, oxygen trigonal bipyramid coordination, and quasi-two dimensional layering give rise to properties distinct from those the cubic perovskites. As bulk materials, most focus in this has been on rare-earth manganites, RMnO R rare earth); these display coupled ferroelectricity antiferromagnetic order. In review, we thin-film manifestations oxides. We cover stability substrates which can be used template structure. show how geometry not only allows further tuning bulk-stable manganites but also realization metastable such as RFeO that combine with weak ferromagnetic The is promising platform stabilize additional search predicted high-temperature superconductivity topological phases materials.