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].

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