Electronic reconstruction at SrMnO3-LaMnO3 superlattice interfaces

Abstract

We use resonant soft x-ray scattering to study electronic reconstruction at the interface between the Mott insulator LaMnO3 and the "band" insulator SrMnO3. Superlattices of these two insulators were shown previously to have both ferromagnetism and metallic tendencies [Koida et al., Phys. Rev. B 66, 144418 (2002)]. By studying a judiciously chosen superlattice reflection we show that the interface density of states exhibits a pronounced peak at the Fermi level, similar to that predicted by Okamoto et al. [Phys. Rev. B 70, 241104(R) (2004)]. The intensity of this peak correlates with the conductivity and magnetization, suggesting it is the driver of metallic behavior. Our study demonstrates a general strategy for using RSXS to probe the electronic properties of heterostructure interfaces.

4.2 pages, 4 figures

References in corpus (1)

• Photoemission from buried interfaces in SrTiO3/LaTiO3 superlattices

Cited by in corpus (7)

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• Metal-insulator transition in $(LaMn{O}_3{)}_{2n}/(SrMn{O}_3{)}_n$ superlattices
• Magnetically asymmetric interfaces in a (LaMnO${}_3$)/(SrMnO${}_3$) superlattice due to structural asymmetries
• Theory of Manganite Superlattice
• Electronic structure of the SrTiO${}_3$/LaAlO${}_3$ interface revealed by resonant soft x-ray scattering
• Electron gas at the interface between two antiferromagnetic insulating manganites