When two become one: an insight into 2D conductive oxide interfaces

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Abstract

Recent progress has led to conductance confinement at the interface of complex oxide heterostructures, thereby providing new opportunities to explore nano-electronic as well as nano-ionic devices. In this paper we describe how interfacial contiguity between materials can trigger redox reactions inducing metallic conductivity along the interface of SrTiO3-based heterostructures and create new types of 2 Dimension Electron Gases (2DEG) at the hetero-interface with electron mobility enhancements of more than one order of magnitude higher than those of hitherto investigated perovskite-type interfaces. Furthermore, our recent results, examining strain effects at interfaces, demonstrate the potential of achieving hetero-epitaxial thin films with superior ionic or electronic properties. We also present a novel concept that uncovers a wide variety of possible technological opportunities for materials design utilizing ionic conducting multi-layered heterostructures. These findings hold the potential to pave the way for novel and/or superior all-oxide electronic and ionic devices.
Original languageEnglish
JournalJournal of Electroceramics
Volume38
Issue number1
Pages (from-to)1-23
ISSN1385-3449
DOIs
Publication statusPublished - 2017

Keywords

  • Metal oxides
  • Interface
  • 2D electron gas
  • Ionics
  • Thin films
  • Heterostructures
  • Mesoscopic physics

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