Theory of quantum paraelectrics and the metaelectric transition

Details Theory of quantum paraelectrics and the metaelectric transition Theory of quantum paraelectrics and the metaelectric transition

2009-09-30

arxiv.org/abs/0909.5660v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures

Scientific paper

We present a microscopic model of the quantum paraelectric-ferroelectric phase transition with a focus on the influence of coupled fluctuating phonon modes. These may drive the continuous phase transition first order through a metaelectric transition and furthermore stimulate the emergence of a textured phase that preempts the transition. We discuss two further consequences of fluctuations, firstly for the heat capacity, and secondly we show that the inverse paraelectric susceptibility displays T^2 quantum critical behavior, and can also adopt a characteristic minimum with temperature. Finally, we discuss the observable consequences of our results.

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