Electronic reconstruction at the isopolar LaTiO3/LaFeO3 interface: An x-ray photoemission and density functional theory study

Abstract

We report the formation of a non-magnetic band insulator at the isopolar interface between the antiferromagnetic Mott-Hubbard insulator LaTiO3 and the antiferromagnetic charge transfer insulator LaFeO3. By density functional theory calculations, we find that the formation of this interface state is driven by the combination of O band alignment and crystal field splitting energy of the t2g and eg bands. As a result of these two driving forces, the Fe 3d bands rearrange and electrons are transferred from Ti to Fe. This picture is supported by x-ray photoelectron spectroscopy, which confirms the rearrangement of the Fe 3d bands and reveals an unprecedented charge transfer up to 1.2+/-0.2 e-/interface unit cell in our LaTiO3/LaFeO3 heterostructures.

arXiv commentAccepted for publication in Phys. Rev. Lett. (2014). Supplemental material is available upon request

References in corpus (12)

• Why Some Interfaces Cannot be Sharp
• The role of oxygen vacancies in SrTiO3 at the LaAlO3/SrTiO3 interface
• Origin of charge density at LaAlO3-on-SrTiO3 hetero-interfaces; possibility of intrinsic doping
• High-temperature interface superconductivity between metallic and insulating cuprates
• Mott transition and suppression of orbital fluctuations in orthorhombic 3$d^1$ perovskites
• Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures
• Electrostatic carrier doping of GdTiO3/SrTiO3 interfaces
• Polarity-induced oxygen vacancies at LaAlO3|SrTiO3 interfaces
• Photoemission from buried interfaces in SrTiO3/LaTiO3 superlattices
• Electronic structure induced reconstruction and magnetic ordering at the LaAlO${}_3|$SrTiO${}_3$ interface
• Engineering Correlation Effects via Artificially Designed Oxide Superlattices
• Metallic Conductance at the Interface of Tri-color Titanate Superlattices

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