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Choi, Kyoung Jin
Energy Conversion Materials (EcoMAT) Lab
Research Interests
  • Solar cells, thermoelectrics, piezoelectric

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Stabilization of monodomain polarization in ultrathin PbTiO3 films

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Title
Stabilization of monodomain polarization in ultrathin PbTiO3 films
Author
Fong, DDKolpak, AMEastman, JAStreiffer, SKFuoss, PHStephenson, GBThompson, CKim, DMChoi, Kyoung JinEom, CBGrinberg, IRappe, AM
Keywords
Curie temperature; Ionic adsorbates; Monodomains
Issue Date
2006
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.96, no.12, pp. -
Abstract
Using in situ high-resolution synchrotron x-ray scattering, the Curie temperature T-C has been determined for ultrathin c-axis epitaxial PbTiO3 films on conducting substrates (SrRuO3 on SrTiO3), with surfaces exposed to a controlled vapor environment. The suppression of T-C was relatively small, even for the thinnest film (1.2 nm). We observe that 180 degrees stripe domains do not form, indicating that the depolarizing field is compensated by free charge at both interfaces. This is confirmed by ab initio calculations that find polar ground states in the presence of ionic adsorbates.
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DOI
http://dx.doi.org/10.1103/PhysRevLett.96.127601
ISSN
0031-9007
Appears in Collections:
MSE_Journal Papers
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