Uniaxial strain-modulated conductivity in manganite superlattice $(LaMnO3/SrMnO3)$ Available to Purchase

We have investigated the magnetic ordering and electrical conductivity transitions of $(LaMnO3)2/(SrMnO3)2$ superlattices grown on $SrTiO3$ substrate based on density-functional theory. It is found that the uniaxial tensile strain along the $z$ axis of about 1.4% induced a magnetic transition from antiferromagnetic to ferromagnetic ordering. At the interface the orbital order changes from a combination of $x2−y2$ and $3z2−r2$ to $x2−y2$ as strain becomes more compressive; as a result the electrical transport is transformed from three-dimensions to two-dimensions at the high uniaxial compressive strain. Our results suggest that the out-of-plane electrical conductivity can be modulated and controlled by uniaxial strain.