  Topological superconductors, which support Majorana fermion excitations, have
been the subject of intense studies due to their novel transport properties and
their potential applications in fault-tolerant quantum computations. Here we
propose a new type of topological superconductors which can be used as a novel
source of correlated spin currents. We show that inducing superconductivity on
a AIII class topological insulator wire, which respects a chiral symmetry and
supports protected fermionic end states, will result in a topological
superconductor. This topological superconductor supports two topological phases
with one or two Majorana fermion end states respectively. In the phase with two
Majorana fermions, the superconductor can split Cooper pairs efficiently into
electrons in two spatially separated leads due to Majorana induced resonant
crossed Andreev reflections. The resulting currents in the leads are correlated
and spin-polarized. Importantly, the proposed topological superconductors can
be realized using quantum anomalous Hall insulators in proximity to
superconductors.
