Quantum fluctuation and geometrical frustration effects on electric polarization

Abstract

We examine theoretically a possibility of ferroelectricity caused by electronic charge order without inversion symmetry, motivated by layered iron oxides. Quantum electronic models in a paired-triangular lattice are analyzed by utilizing the variational Monte Carlo simulation. Our calculation demonstrates that combined effects of electron transfer between the layers, corresponding to quantum fluctuation between the potential minima, and geometrical frustration promote appearance of an electric polarization. Present results are in contrast to the conventional manner of quantum fluctuation in ferroelectricity.

5 pages, 4 figures

References in corpus (3)

• Charge order, dynamics, and magneto-structural transition in multiferroic LuFe${}_2$O${}_4$
• Charge order in LuFe2O4: antiferroelectric ground state and coupling to magnetism
• Magneto-Dielectric phenomena in charge and spin frustrated system of layered iron oxide

Cited by in corpus (5)

• Electronic Ferroelectricity and Frustration
• Ferroelectricity from iron valence ordering in rare earth ferrites?
• Quantum Dielectric Fluctuation in an Electronic Ferroelectricity studied by Variational Monte-Carlo Method
• Charge Dynamics in a Correlated Fermion System on a Geometrically Frustrated Lattice
• Probing the Interplay between Quantum Charge Fluctuations and Magnetic Ordering in LuFe2O4