Linked Life Data

19113352

Source:http://linkedlifedata.com/resource/pubmed/id/19113352

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
20
pubmed:dateCreated
2008-12-30
pubmed:abstractText
The perovskite SrTiO3 becomes metallic with 0.03% to 0.1% Nb substitution on the Ti site, while BaTiO3 remains insulating above 10% Nb substitution. Given the nearly identical structure and electron counts of the two materials, the distinct ground states for low substitution have been a long-standing puzzle. Here we find from neutron studies of average and local structure the subtle yet critical difference that we believe underpins the distinct electronic properties in these fascinating materials. While SrTi0.875Nb0.125O3 possesses a distorted noncubic structure at 15 K, (Nb/Ti)O6 octahedra in the structure are regular. BaTi0.875Nb0.125O3, on the other hand, shows evidence for local cation off centering while retaining a cubic structure.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Nov
pubmed:issn
0031-9007
pubmed:author
pubmed:issnType
Print
pubmed:day
14
pubmed:volume
101
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
205502
pubmed:year
2008
pubmed:articleTitle
Local structural origins of the distinct electronic properties of Nb-substituted SrTiO3 and BaTiO3.
pubmed:affiliation
Materials Department, University of California, Santa Barbara, California 93106, USA.
pubmed:publicationType
Journal Article