  We report complex band structure (CBS) calculations for the four late
transition metal monoxides, MnO, FeO, CoO and NiO, in their paramagnetic phase.
The CBS is obtained from density functional theory plus dynamical mean field
theory (DMFT) calculations to take into account correlation effects. The
so-called $\beta$ parameters, governing the exponential decay of the
transmission probability in the non-resonant tunneling regime of these oxides,
are extracted from the CBS. Different model constructions are examined in the
DMFT part of the calculation. The calculated $\beta$ parameters provide
theoretical estimation for the decay length in the evanescent channel, which
would be useful for tunnel junction applications of these materials.
