@article{33504,
  keywords = {Transmission electron microscopy, Room temperature, Phase transitions, Ferroelectric materials, Nanocrystals, Ferroelectricity, Nanoscale, Ferroelectric, Atomic scale, Colloidal, Colloidal nanocrystals, Germanium telluride, GeTe, Linear components, Polar, Polar ordering, Germanium},
  author = {M.J Polking and J.J Urban and D.J Milliron and H Zheng and E Chan and M.A Caldwell and S Raoux and C.F Kisielowski and Joel W Ager and Ramamoorthy Ramesh and A.P Alivisatos},
  title = {Size-dependent polar ordering in colloidal GeTe nanocrystals},
  abstract = {The question of the nature and stability of polar ordering in nanoscale ferroelectrics is examined with colloidal nanocrystals of germanium telluride (GeTe). We provide atomic-scale evidence for room-temperature polar ordering in individual nanocrystals using aberration-corrected transmission electron microscopy and demonstrate a reversible, size-dependent polar-nonpolar phase transition of displacive character in nanocrystal ensembles. A substantial linear component of the distortion is observed, which is in contrast with theoretical reports predicting a toroidal state. © 2011 American Chemical Society.},
  year = {2011},
  journal = {Nano Letters},
  volume = {11},
  number = {3},
  pages = {1147-1152},
  issn = {15306984},
  doi = {10.1021/nl104075v},
  note = {cited By 65},
  language = {eng},
}