<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Lichtensteiger C</dc:creator>
  <dc:creator>Triscone JM</dc:creator>
  <dc:creator>Junquera J</dc:creator>
  <dc:creator>Ghosez P</dc:creator>
  <dc:date>2005</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">The evolution of tetragonality with thickness has been probed in epitaxial c-axis oriented PbTiO3 films with thicknesses ranging from 500 down to 24 A. High resolution x ray pointed out a systematic decrease of the c-axis lattice parameter with decreasing film thickness below 200 A. Using a first-principles model Hamiltonian approach, the decrease in tetragonality is related to a reduction of the polarization attributed to the presence of a residual unscreened depolarizing field. It is shown that films below 50 A display a significantly reduced polarization but still remain ferroelectric.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://sonar.ch/global/documents/26535</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.94.047603</dc:relation>
  <dc:relation>info:eu-repo/semantics/altIdentifier/pmid/15783599</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:source>Physical review letters. - 2005</dc:source>
  <dc:title xmlns:ns1="xml" ns1:lang="en">Ferroelectricity and tetragonality in ultrathin PbTiO3 films.</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>