Nano-engineering of electron correlation in oxide superlattices

Jude Laverock, Man Gu, Vedran Jovic, Jiwei Lu, Stuart A. Wolf, Ruimin Qiao, Wanli Yang, Kevin E. Smith

Research output: Contribution to journalArticle (Academic Journal)peer-review

3 Citations (Scopus)
194 Downloads (Pure)

Abstract

Oxide heterostructures and superlattices (SLs) have attracted a great deal of attention in recent years owing to the rich exotic properties encountered at their interfaces. We focus on the potential of tunable correlated oxides by investigating the spectral function of the prototypical correlated metal SrVO3, using soft x-ray absorption spectroscopy and resonant inelastic soft x-ray scattering to access both unoccupied and occupied electronic states, respectively. We demonstrate a remarkable level of tunability in the spectral function of SrVO3 by varying its thickness within the SrVO3/SrTiO3 SL, showing that the effects of electron correlation can be tuned from dominating the energy spectrum in a strongly correlated Mott–Hubbard insulator, towards a correlated metal. We show that the effects of dimensionality on the correlated properties of SrVO3 are augmented by interlayer coupling, yielding a highly flexible correlated oxide that may be readily married with other oxide systems.
Original languageEnglish
Article number031001
Number of pages9
JournalNano Futures
Volume1
Issue number3
DOIs
Publication statusPublished - 23 Oct 2017

Keywords

  • Strongly correlated materials
  • Oxide heterostructures
  • Soft x-ray spectroscopy
  • Strontium vanadate
  • Metal-insulator transition
  • Resonant inelastic x-ray scattering

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