Linked Life Data

17962556

Source:http://linkedlifedata.com/resource/pubmed/id/17962556

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5850
pubmed:dateCreated
2007-10-26
pubmed:abstractText
Mott transitions, which are metal-insulator transitions (MITs) driven by electron-electron interactions, are usually accompanied in bulk by structural phase transitions. In the layered perovskite Ca(1.9)Sr(0.1)RuO4, such a first-order Mott MIT occurs in the bulk at a temperature of 154 kelvin on cooling. In contrast, at the surface, an unusual inherent Mott MIT is observed at 130 kelvin, also on cooling but without a simultaneous lattice distortion. The broken translational symmetry at the surface causes a compressional stress that results in a 150% increase in the buckling of the Ca/Sr-O surface plane as compared to the bulk. The Ca/Sr ions are pulled toward the bulk, which stabilizes a phase more amenable to a Mott insulator ground state than does the bulk structure and also energetically prohibits the structural transition that accompanies the bulk MIT.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Oct
pubmed:issn
1095-9203
pubmed:author
pubmed:issnType
Electronic
pubmed:day
26
pubmed:volume
318
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
615-9
pubmed:year
2007
pubmed:articleTitle
A surface-tailored, purely electronic, mott metal-to-insulator transition.
pubmed:affiliation
Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.