Theory of quantum paraelectrics and the metaelectric transition

Abstract

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.

5 pages, 2 figures

References in corpus (5)

• Inhomogeneous phase formation on the border of itinerant ferromagnetism
• Observation of a multiferroic critical end point
• Itinerant ferromagnetism in an atomic Fermi gas: Influence of population imbalance
• Quantum Critical Paraelectrics and the Casimir Effect in Time
• Non-analytic behavior of 2D itinerant ferromagnets

Cited by in corpus (9)

• Simulation and understanding of quantum crystals
• Superconductivity in dilute SrTiO${}_3$: a review
• Prospects and Applications Near Ferroelectric Quantum Phase Transitions
• First-principles prediction of oxygen octahedral rotations in perovskite-structure EuTiO3
• Anisotropic superconductivity mediated by ferroelectric fluctuations in cubic systems with spin-orbit coupling
• Quantum Critical Phenomena in a Compressible Displacive Ferroelectric
• Lamellar fluctuations melt ferroelectricity
• Bilayer honeycomb lattice with ultracold atoms: Multiple Fermi surfaces and incommensurate spin density wave instability
• Optical phonon contribution to the thermal conductivity of a quantum paraelectric