Abstract
The electric field dependence of the Curie temperature of a ferroelectric crystal in its paraelectric phase is investigated from the Silverman–Joseph Hamiltonian augmented with fourth-order phonon coordinates using the temperature dependent double-time Green's function technique. It is shown that the Curie temperature shifts to a lower value by the application of an electric field. This result agrees with the recent Raman scattering data of Worlock and Fleury for SrTiO3.
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