Pseudogap formation in models for manganites

The density of states and one-particle spectral function A(k: omega) of the one- and two-orbital models for manganites, the latter with Jahn-Teller ph onons, are evaluated using Monte Carlo techniques. Unexpectedly robust pseu dogap (PG) features were found at low and intermediate temperatures, partic ularly at or near regimes where phase separation occurs as T --> 0. The PG follows the chemical potential and is caused by the formation of ferromagne tic metallic clusters in an insulating background. It is argued that PG for mation should be generic of mixed-phase regimes. The results are in good ag reement with recent photoemission experiments for La1.2Sr1.8Mn2O7.