We report on a PE study of the electronic structure of pristine TiSe2. The
experimental data are compared with results of band-structure calculations.
It is confirmed that TiSe2 reveals semimetallic properties. For the first
time rare-earth metals were attempted to be incorporated in situ into TiSe2
. It is found that divalent Eu can be easy intercalated, whereas deposition
of trivalent Gd leads to strong interfacial reactions. The electronic stru
cture of the Eu-intercalation compound cannot be simply described within a
rigid-band approach assuming charge transfer from Eu to unoccupied Ti d sta
res. In a more elaborated approach hybridization phenomena have to be taken
into consideration.