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Science 24 April 2009:
Vol. 324. no. 5926, p. 465
DOI: 10.1126/science.1168940
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Technical Comments

Comment on "Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures"

Xin Guo

García-Barriocanal et al. (Reports, 1 August 2008, p. 676) reported colossal conductivity enhancements in yttria-stabilized zirconia (YSZ)/strontium titanate (STO) epitaxial heterostructures and claimed that the conductivity was ionic. I argue that the claimed ionic conductivity lacks experimental support and that the observed conductivity enhancement is most probably due to the p-type conductivity of STO.

Institut für Festkörperforschung, Forschungszentrum Jülich, 52425 Jülich, Germany. E-mail: x.guo{at}fz-juelich.de

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Response to Comment on "Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures".
J. Garcia-Barriocanal, A. Rivera-Calzada, M. Varela, Z. Sefrioui, E. Iborra, C. Leon, S. J. Pennycook, and J. Santamaria (2009)
Science 324, 465
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