Metallic and Insulating Interfaces of Amorphous SrTiO3-Based Oxide Heterostructures

Yunzhong Chen, Nini Pryds, J.E. Kleibeuker, Gertjan Koster, Jirong Sun, Eugen Stamate, Baogen Shen, Augustinus J.H.M. Rijnders, Søren Linderoth

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Abstract

The conductance confined at the interface of complex oxide heterostructures provides new opportunities to explore nanoelectronic as well as nanoionic devices. Herein we show that metallic interfaces can be realized in SrTiO3-based heterostructures with various insulating overlayers of amorphous LaAlO3, SrTiO3, and yttria-stabilized zirconia films. On the other hand, samples of amorphous La7/8Sr1/8MnO3 films on SrTiO3 substrates remain insulating. The interfacial conductivity results from the formation of oxygen vacancies near the interface, suggesting that the redox reactions on the surface of SrTiO3 substrates play an important role.
Original languageUndefined
Pages (from-to)3774-3778
Number of pages5
JournalNano letters
Volume11
Issue number9
DOIs
Publication statusPublished - 2011

Keywords

  • METIS-280112
  • IR-104474

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