The electronic and magnetic properties of a series of one-dimensional carbon-free sandwich polymers [(Ge5)TM](TM= Ti,V,Cr,Mn,Fe)are examined based on first principles calculations to investigate their
Electronic phase separation(EPS),i.e.the inherent electronic inhomogeneity,has been widely reported in the hole-doped manganites R1-XAXMnO3.R is the rare-earth elements and A is the alkaline element s