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In this work the charge transport properties of charge ordered (CO)La1-xCaxMnO3 (LCMO) (x= 0.55, 0.67) epitaxial thin films and polycrystals arediscussed following the recent controversy of localised electron states vs.weakly or de- localised charge density wave (CDW) states in CO manganites. Thetransport properties were investigated by current vs. voltage, direct currentresistivity vs. temperature, local activation energy vs. temperature,magnetoresistance and admittance spectroscopy measurements, which all indicateda localised electronic structure in the single CO phase. Delocalised chargeanomalies observed previously may be restricted to phase separated materials.

On the electronic structure of the charge-ordered phase in epitaxial and polycrystalline La1-xCaxMnO3 (x = 0.55, 0.67) perovskite manganites