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Electronic structure of the SrTiO(3)/LaAlO(3) interface revealed by resonant soft x-ray scattering

  • H. Wadati*
  • , J. Geck
  • , D. G. Hawthorn
  • , T. Higuchi
  • , M. Hosoda
  • , C. Bell
  • , Y. Hikita
  • , H. Y. Hwang
  • , C. Schussler-Langeheine
  • , E. Schierle
  • , E. Weschke
  • , G. A. Sawatzky
  • , Chris Bell
  • *Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

5 Citations (Scopus)

Abstract

Interfaces in heterostructures composed of two different transition-metal oxides are now a strongly growing research topic in condensed-matter physics due to the anomalous electronic properties very different from those of the component materials. Here we present resonant soft x-ray scattering studies of SrTiO(3)/LaAlO(3) superlattices. From the existence of the forbidden Bragg peak (003), we found evidence for differences between the bulk and the interface electronic structures. The photon-energy dependence near the O 1s edge and polarization dependence showed that there are two structures split by similar to 1 eV, which were not observed in the O 1s x-ray absorption spectrum. The origin of this splitting is still unclear, but we consider that this is not only due to the splitting of t(2g) states at the interface but also due to the difference between the O 1s binding energies for bulk and interface oxygen.

Original languageEnglish
Title of host publicationBURIED INTERFACE SCIENCES WITH X-RAYS AND NEUTRONS 2010
Place of PublicationBRISTOL
PublisherDeutsche Physikalische Gesellschaft & IOP Publishing Ltd
Number of pages9
DOIs
Publication statusPublished - 2011
EventSummer Workshop on Buried Interface Science with X-rays and Neutrons - Nagoya, Japan
Duration: 25 Jul 201027 Jul 2010

Publication series

NameIOP Conference Series-Materials Science and Engineering
PublisherIOP PUBLISHING LTD
Volume24
ISSN (Print)1757-8981

Conference

ConferenceSummer Workshop on Buried Interface Science with X-rays and Neutrons
Country/TerritoryJapan
Period25/07/1027/07/10

Keywords

  • OXIDES

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