Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures

Yunzhong Chen; Nini Pryds; Josee E. Kleibeuker; Gertjan Koster; Jirong Sun; Eugen Stamate; Baogen Shen; Guus Rijnders; S. Linderoth

doi:10.1021/nl201821j

Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures

Materials Science 2015-06-12 v1

Authors: Yunzhong Chen , Nini Pryds , Josee E. Kleibeuker , Gertjan Koster , Jirong Sun , Eugen Stamate , Baogen Shen , Guus Rijnders , S. 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.

Keywords

oxide heterostructures oxide interfaces thin films

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@article{arxiv.1212.6901,
  title  = {Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures},
  author = {Yunzhong Chen and Nini Pryds and Josee E. Kleibeuker and Gertjan Koster and Jirong Sun and Eugen Stamate and Baogen Shen and Guus Rijnders and S. Linderoth},
  journal= {arXiv preprint arXiv:1212.6901},
  year   = {2015}
}

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17 pages, 4 figures

Metallic and insulating interfaces of amorphous SrTiO3-based oxide heterostructures

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