Design of a Mott Multiferroic from a Nonmagnetic Polar Metal.
Phys Rev Lett
; 115(8): 087202, 2015 Aug 21.
Article
in En
| MEDLINE
| ID: mdl-26340204
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.
Search on Google
Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2015
Type:
Article
Affiliation country:
United States