Metallic ferroelectricity induced by anisotropic unscreened coulomb interaction in LiOsO3

Abstract

As the first well-documented example of the ferroelectric metal, LiOsO3 has received extensive research attention recently. Using density-functional calculations, we perform a systematic study for LiOsO3. We address the controversy about the depth of the double well in the potential surface, and propose that the ferroelectric transition is order-disorder like. Moreover, we unambiguously demonstrate that the electric screening in this compound is highly anisotropic, and there is still unscreened dipole-dipole interaction in one special direction which results in the long range ferroelectric order despite the metallic nature of LiOsO3.

References in corpus (7)

• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Surface Magnetoelectric Effect in Ferromagnetic Metal Films
• Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
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• Dual nature of the ferroelectric and metallic state in LiOsO${}_3$
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