Local polarization and valence distribution in LaNiO3 / LaMnO3 heterostructures

Masato Anada, Satoshi Sakaguchi, Kazuki Nagai, Miho Kitamura, Koji Horiba, Hiroshi Kumigashira, Yusuke Wakabayashi

Research output: Contribution to journalArticlepeer-review

Abstract

The inside of the electrical double layer at perovskite oxide heterointerfaces is examined. Here, we report the local polarization and valence distribution in LaNiO3/LaMnO3 and LaMnO3/LaNiO3 bilayers on a SrTiO3 (001) substrate. Simultaneous measurements of two aspects of the structure are realized by using Bayesian inference based on resonant- and nonresonant-surface x-ray diffraction data. The results show that the average Mn valences are Mn3.12+ and Mn3.19+ for the two samples. The intensity of their local electric field is ∼1 GV/m and the direction of the field points from LaMnO3 to LaNiO3.

Original languageEnglish
Article number085111
JournalPhysical Review B
Volume104
Issue number8
DOIs
Publication statusPublished - 2021 Aug 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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