TY - JOUR
T1 - Origin of colossal ionic conductivity in oxide multilayers
T2 - Interface induced sublattice disorder
AU - Pennycook, Timothy J.
AU - Beck, Matthew J.
AU - Varga, Kalman
AU - Varela, Maria
AU - Pennycook, Stephen J.
AU - Pantelides, Sokrates T.
PY - 2010/3/16
Y1 - 2010/3/16
N2 - Oxide ionic conductors typically operate at high temperatures, which limits their usefulness. Colossal room-temperature ionic conductivity was recently discovered in multilayers of yttria-stabilized zirconia (YSZ) and SrTiO3. Here we report density-functional calculations that trace the origin of the effect to a combination of lattice-mismatch strain and O-sublattice incompatibility. Strain alone in bulk YSZ enhances O mobility at high temperatures by inducing extreme O disorder. In multilayer structures, O-sublattice incompatibility causes the same extreme disorder at room temperature.
AB - Oxide ionic conductors typically operate at high temperatures, which limits their usefulness. Colossal room-temperature ionic conductivity was recently discovered in multilayers of yttria-stabilized zirconia (YSZ) and SrTiO3. Here we report density-functional calculations that trace the origin of the effect to a combination of lattice-mismatch strain and O-sublattice incompatibility. Strain alone in bulk YSZ enhances O mobility at high temperatures by inducing extreme O disorder. In multilayer structures, O-sublattice incompatibility causes the same extreme disorder at room temperature.
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U2 - 10.1103/PhysRevLett.104.115901
DO - 10.1103/PhysRevLett.104.115901
M3 - Article
AN - SCOPUS:77949545229
SN - 0031-9007
VL - 104
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
M1 - 115901
ER -