We report on the electronic properties of superlattices composed of three different antiferromagnetic insulators,   NdMnO₃/SrMnO₃/LaMnO₃ grown on SrTiO₃ substrates. Photoemission   spectra obtained  by  tuning  the  x-ray  energy  at  the  Mn  2p → 3d edge  show  a  Fermi  cut-off,  indicating metallic behavior mainly originating from Mn e_g electrons. Furthermore, the density of states near the  Fermi  energy  and  the  magnetization  obey  a  similar  temperature  dependence,  suggesting  a correlation between the spin and charge degrees of freedom at the interfaces of these oxides.

DOI: 10.1063/1.3583586