Electronic Reconstruction at the Isopolar LaTiO3/LaFeO3 Interface: An X-Ray Photoemission and Density-Functional Theory Study

J.E. Kleibeuker, Z. Zhong, H. Nishikawa, J. Gabel, A. Müller, F. Pfaff, M. Sing, K. Held, R. Claessen, G. Koster, G. Rijnders

Research output: Contribution to journalArticleAcademicpeer-review

50 Citations (Scopus)
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Abstract

We report the formation of a nonmagnetic 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±0.2e−/interface unit cell in our LaTiO3/LaFeO3 heterostructures.
Original languageEnglish
Article number237402
Number of pages5
JournalPhysical review letters
Volume113
Issue number23
DOIs
Publication statusPublished - 2014

Keywords

  • METIS-306767
  • IR-94981

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