Electronic Ferroelectricity and Frustration

Abstract

Beyond a conventional classification of ferroelectricity, there is a class of materials where electronic degrees of freedom and electronic interactions are directly responsible for electric polarization and ferroelectric transition. This is termed electronic ferroelectricity. In this article, we review electronic ferroelectricity from a view point of frustration. Experimental and theoretical examinations in spin driven ferroelectric materials, recently termed multiferroics, are introduced. Spin frustration caused by competing magnetic interactions is of prime importance for this type of ferroelectricity. Charge driven ferroelectricity where electronic charge order induces electric polarization is reviewed. In particular, exotic dielectric and magneto-dielectric properties in layered iron oxides are focused on. Through a number of recent experimental and theoretical researches, charge fluctuation due to frustrated geometry plays essential roles on electronic ferroelectricity in this compound.

13 pages, 13 figures, to be published in J. Phys. Sco. Jpn. Special Topics "Novel States of Matter Induced by Frustration"

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Cited by in corpus (25)

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• Absence of charge order in the dimerized κ-phase BEDT-TTF salts
• Magneto-electric effect in NdCrTiO5
• Collective excitation of electric dipole on molecular dimer in organic dimer-Mott insulator
• Molecular Quantum Materials: Electronic Phases and Charge Dynamics in Two-Dimensional Organic Solids
• Relaxor ferroelectricity induced by electron correlations in a molecular dimer Mott insulator
• Evidence for electronically-driven ferroelectricity in the family of strongly correlated dimerized BEDT-TTF molecular conductors
• Anions effects on the electronic structure and electrodynamic properties of the Mott insulator $\kappa$-(BEDT-TTF)${}_2$Ag${}_2$(CN)${}_3$
• Charge-order-induced ferroelectricity in LaVO${}_3$/SrVO${}_3$ superlattices
• Collective Charge Excitation in a Dimer Mott Insulating System
• Magnetoelectric Effect driven by Magnetic Domain Modification in LuFe2O4
• Impact of the various spin and orbital ordering processes on multiferroic properties of orthovanadate DyVO3
• Strong light-field effects driven by nearly single-cycle 7-fs light field in correlated organic conductors
• Hidden Charge Order in an Iron Oxide Square-Lattice Compound
• Lattice dynamics coupled to charge and spin degrees of freedom in the molecular dimer-Mott insulator $\kappa$-(BEDT-TTF)${}_2$Cu[N(CN)${}_2$]Cl
• Ferroelectricity induced by cooperative orbital ordering and Peierls instability
• Photoinduced Enhancement of Anisotropic Charge Correlations on Triangular Lattices with Trimers
• Resonant inelastic x-ray scattering probes the electron-phonon coupling in the spin-liquid kappa-(BEDT-TTF)2Cu2(CN)3
• Superlattice-induced ferroelectricity in charge-ordered La${}_{1/3}$Sr${}_{2/3}$FeO${}_3$
• Metal-insulator transition caused by the coupling to localized charge-frustrated systems under ice-rule local constraint
• Electron-lattice coupling contributions to polarization switching in charge-order-induced ferroelectrics
• Phonon-Spectrum Narrowing Induced by Ultrafast Charge Fluctuation in an Organic Dimer Mott Insulator
• 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
• Temporal modulation of second harmonic generation in ferroelectrics by a pulsed electric field