Metallic characteristics in superlattices composed of insulators, NdMnO3/SrMnO3/LaMnO3
Metallic characteristics in superlattices composed of insulators, NdMnO3/SrMnO3/LaMnO3
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 eg electrons. Furthermore, the density of states …