Metallic and Insulating Interfaces of Amorphous SrTiO3-Based Oxide Heterostructures

Yunzhong Chen, Nini Pryds, Josée E. Kleibeuker, Gertjan Koster, Jirong Sun, Eugen Stamate, Baogen Shen, Guus Rijnders, Søren Linderoth

    Research output: Contribution to journalJournal articleResearchpeer-review


    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 languageEnglish
    JournalNano Letters
    Issue number9
    Pages (from-to)3774-3778
    Publication statusPublished - 2011


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