Design of a Mott Multiferroic from a Non-Magnetic Polar Metal

Abstract

We examine the electronic properties of newly discovered "ferroelectric" metal LiOsO${}_3$ combining density-functional and dynamical mean-field theories. We show that the material is close to a Mott transition and that electronic correlations can be tuned to engineer a Mott multiferroic state in 1/1 superlattice of LiOsO${}_3$ and LiNbO${}_3$. We use electronic structure calculations to predict that the (LiOsO${}_3$)${}_1$/(LiNbO${}_3$)${}_1$ superlattice is a type-I multiferroic material with a ferrolectric polarization of 41.2~$\mu$C cm${}^{-2}$, Curie temperature of 927\,K, and Néel temperature of 671\,K. Our results support a route towards high-temperature multiferroics, \emph{i.e.}, driving non-magnetic \emph{polar metals} into correlated insulating magnetic states.

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• Prediction of a controllable Weyl semi-metallic phase in inversion-asymmetric BiSb
• Ferroelectricity with Asymmetric Hysteresis in Metallic LiOsO3 Ultrathin Films
• Two-dimensional Topological Ferroelectric Metal with Giant Shift Current
• Polar Metals Taxonomy for Materials Classification and Discovery
• Electrical Detection of Ferroelectric-like Metals through Nonlinear Hall Effect
• Interplay between Ferroelectricity and Metallicity in BaTiO${}_3$
• Electronic correlation assisted ferroelectric metallic state in LiOsO${}_3$
• Structural and metal-insulator transitions in rhenium based double perovskites via orbital ordering
• Pressure-induced enhancement of non-polar to polar transition temperature in metallic LiOsO${}_3$
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• (LaTiO${}_3$)${}_n$/(LaVO${}_3$)${}_n$ as a model system for unconventional charge transfer and polar metallicity
• Effect of strain and doping on the polar metal phase in LiOsO${}_3$
• Influences of spin-orbit coupling on Fermi surfaces and Dirac cones in ferroelectric-like polar metals
• Possible origin of the absence of magnetic order in LiOsO${}_3$: Spin-orbit coupling controlled ground state
• Strain Induced Slater Transition in Polar Metal LiOsO${}_3$
• Two-dimensional ferroelectric metal for electrocatalysis
• Two-dimensional metallic ferroelectricity in PbTe monolayer by electrostatic doping