Oxide Topological Insulator
The first prediction of an oxide TI, BaBiO3, with the largest energy gap. The perovskite BaBiO3 has been known as a superconductor with Tc ~ 30 K. We discovered that it is also a TI with Eg = 0.7 eV and Z2 (1; 111). It supplies a platform of interplay between superconductivity and topological surface states, to hunt for Maojorana Fermions [1].
![original](/2956098/original-1541666838.jpg?t=eyJ3aWR0aCI6MjQ2LCJvYmpfaWQiOjI5NTYwOTh9--9698ce6394aac047b8d5754ce63d7c8da010499e)