Response to Comment on "Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO2:Y2O3/SrTiO3 Heterostructures"
J. García-Barriocanal,1
A. Rivera-Calzada,1
M. Varela,2
Z. Sefrioui,1
E. Iborra,3
C. Leon,1
S. J. Pennycook,2
J. Santamaría1,*
Guo suggests that the reported ionic conductivity of ZrO
2:Y
2O
3/SrTiO
3 heterostructures might be due to the electronic conductivity
from the SrTiO
3. We point out shortcomings in his reasoning
and underscore that our results show that any electronic contribution
to the conductance is at least three orders of magnitude lower
than the ionic contribution determined by ac methods.
2 Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
3 Escuela Técnica Superior de Ingenieros de Telecomunicaciones, Universidad Politécnica de Madrid. Madrid 28040, Spain.
* To whom correspondence should be addressed. E-mail: jacsan{at}fis.ucm.es
