Abstract
The electronic structures of two mixed valence insulators and are studied by using the local density approximation supplemented with the Gutzwiller method and dynamic mean field theory. is found to be a moderately correlated topological insulator, similar to but having much larger bulk band gap. Notably, is revealed to be in a new novel quantum state, strongly correlated topological crystalline Kondo insulator, which is characterized by its nonzero mirror Chern number. The surface calculations find an odd (three) and an even (four) number of Dirac cones for and , respectively.
- Received 13 September 2013
DOI:https://doi.org/10.1103/PhysRevLett.112.016403
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