Multiple low-energy excitons and optical response of $d^0$ double perovskite Ba${}_2$ScTaO${}_6$

A. K. Himanshu, Sujit Kumar, Urmimala Dey +1

Large bandgap insulators are considered promising for applications such as photocatalysts, dielectric resonators and interference filters. Based on synchrotron X-ray diffraction, d…