Onset of metallic behavior in strained (LaNiO3)n/(SrMnO3)2 superlattices

Abstract

(LaNiO3)n/(SrMnO3)2 superlattices were grown using ozone-assisted molecular beam epitaxy. In situ reflection high energy electron diffraction and x-ray scattering has been used to characterize the structural properties of the superlattices, which are strained to the SrTiO3 substrates. The superlattices exhibit excellent crystallinity and interfacial roughness of less than one unit cell. A metal-insulator transition is observed as $n$ is decreased from 4 to 1. Analysis of the transport data suggests an evolution from gapped insulator (n=1) to hopping conductor (n=2) to metal (n=4) with increasing LaNiO3 concentration.

arXiv commentAccepted for publication in Physical Review B

References in corpus (3)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• The metal-insulator transition and its relation to magnetic structure in (LaMnO3)2n/(SrMnO3)n superlattices
• Impurity Conduction and Magnetic Polarons in Antiferromagnetic Oxides

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