Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 1, Pages 175-178Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.175
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The Landau-Ginzburg theory of ferroelectricity predicts the intrinsic coercive field for polarization reversal, but the observed extrinsic coercive field is always much smaller as a result of nucleation, dynamic processes not covered by the static theory. We have realized the intrinsic coercive field for the first time, in two-dimensional Langmuir-Blodgett polymer films as thin as 1 nm. The measured coercive field is in good agreement with the theoretical intrinsic value, exhibits the expected dependence on temperature, and does not depend on thickness below 15 nm.
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