Design of a Mott Multiferroic from a Nonmagnetic Polar Metal

Danilo Puggioni, Gianluca Giovannetti, Massimo Capone, James M. Rondinelli

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

We examine the electronic properties of the newly discovered "ferroelectric metal" LiOsO3 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 the 1/1 superlattice of LiOsO3 and LiNbO3. We use electronic structure calculations to predict that the (LiOsO3)1/(LiNbO3)1 superlattice exhibits strong coupling between magnetic and ferroelectric degrees of freedom with a ferroelectric polarization of 41.2 μC cm-2, Curie temperature of 927 K, and Néel temperature of 379 K. Our results support a route towards high-temperature multiferroics, i.e., driving nonmagnetic polar metals into correlated insulating magnetic states.

Original languageEnglish (US)
Article number087202
JournalPhysical review letters
Volume115
Issue number8
DOIs
StatePublished - Aug 20 2015

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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