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SUMMARY:Predicting the interfacial properties of the perovskite oxide SrTi
 O3 - Roger A. De Souza (RWTH Aachen University)
DTSTART:20110307T160000Z
DTEND:20110307T170000Z
UID:TALK29812@talks.cam.ac.uk
CONTACT:Ian Farnan
DESCRIPTION:There is renewed interest in the properties of hetero- and hom
 ophase boundaries in the perovskite oxide SrTiO3 because of this material'
 s possible application in all-oxide electronics\, as a high-k dielectric\,
  and in resistive-switching devices. In this talk I focus on the interplay
  between point defects and interfaces (grain boundaries and surfaces) in a
 cceptor-doped SrTiO3. Experimental results obtained for various symmetrica
 l low-angle [001] tilt grain boundaries are presented. The results are exa
 mined within a thermodynamic framework that allows the properties of grain
  boundaries in acceptor-doped SrTiO3 to be predicted. The aim is to derive
  relationships between the crystallographic structure of an interface and 
 its transport properties. The second part of the talk concerns non-uniform
  defect distributions at the (100) surface of SrTiO3. A method for probing
  such non-uniform defect distributions will be presented\, together with e
 xperimental data obtained for single crystal substrates. The origins of th
 e non-uniform defect distributions will also be discussed. Lastly\, the im
 plications of results for SrTiO3-based oxide heterostructures are examined
 .\n
LOCATION:T001\, Department of Materials Science and Metallurgy
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