Doping dependence of the bilayered colossal magnetoresistive manganites La(2-x)Sr(1+2x)Mn(2)O(7): Angle Resolved Photoemission studies

We have measured the doping dependence of the bilayered colossal magnetoresistive manganites La(2{\-}x)Sr(1+2x)Mn(2)O(7) with Angle Resolve Photoemission (ARPES). Our measurements reveal profound differences in the spectral features depending on the doping levels. Surprisingly, the spectra corresponding to x = 0.4 exhibit more similarities to those corresponding to x = 0.6 than the ones with x = 0.36 and x = 0.38. Further aspects of these data in relation to the physics of layered manganites will be discussed.