Synthesis, Electronic Structure, and Physical Properties of Layered Oxypnictides SrScCrAsO and BaScCrAsO.

New CrAs-based layered mixed-anion compounds SrScCrAsO (SrScO-21113) and BaScCrAsO (BaScO-32225) were synthesized, and their electronic structures and physical properties were investigated. The structures of these compounds comprise stacking of the anti-fluorite CrAs layer and perovskite-like SrScO or BaScO layers. The lattice constants of these compounds are relatively longer than those of the related compounds, such as BaCrAs, owing to the insertion of a large perovskite blocking layer of SrScO/BaScO.