  We propose new topological insulators in cerium filled skutterudite (FS)
compounds based on ab initio calculations. We find that two compounds CeOs4As12
and CeOs4Sb12 are zero gap materials with band inversion between Os-d and Ce-f
orbitals, which are thus parent compounds of two and three-dimensional
topological insulators just like bulk HgTe. At low temperature, both compounds
become topological Kondo insulators, which are Kondo insulators in the bulk,
but have robust Dirac surface states on the boundary. This new family of
topological insulators has two advantages compared to previous ones. First,
they can have good proximity effect with other superconducting FS compounds to
realize Majarona fermions. Second, the antiferromagnetism of CeOs4Sb12 at low
temperature provides a way to realize the massive Dirac fermion with novel
topological phenomena.
