Termination control of the interface dipole in La0.7 Sr0.3 MnO3 /Nb: SrTiO3 (001) Schottky junctions

Yasuyuki Hikita, Mitsuru Nishikawa, Takeaki Yajima, Harold Y. Hwang

Research output: Contribution to journalArticlepeer-review

Abstract

In order to investigate the interface termination dependence of perovskite band alignments, we have studied the Schottky barrier height at La0.7 Sr0.3 MnO3 /Nb: SrTiO3 (001) heterointerfaces. As the Nb: SrTiO3 semiconductor was varied from TiO2 termination to SrO termination by variable insertion of a SrMnO3 layer, a large systematic increase in the Schottky barrier height was observed. This can be ascribed to the evolution of the interface dipole induced to screen the polar discontinuity at the interface, which gives a large internal degree of freedom for tuning band diagrams in oxides.

Original languageEnglish
Article number073101
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number7
DOIs
Publication statusPublished - Feb 2 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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