Room temperature magnetism in LaVO3/SrVO3 superlattices by geometrically confined doping

Abstract

Based on the Hubbard model of strongly correlated systems, a reduction in the bandwidth of the electrons can yield a substantial change in the properties of the material. One method to modify the bandwidth is geometrically confined doping, i.e. the introduction of a (thin) dopant layer in a material. In this paper, the magnetic properties of LaVO${}_3$/SrVO${}_3$ superlattices, in which the geometrically confined doping is produced by a one monolayer thick SrVO${}_3$ film, are presented. In contrast to the solid solution La${}_{1-x}$Sr${}_x$VO${}_3$, such superlattices have a finite magnetization up to room temperature. Furthermore, the total magnetization of the superlattice depends on the thickness of the LaVO${}_3$ layer, indicating an indirect coupling of the magnetization that emerges at adjacent dopant layers. Our results show that geometrically confined doping, like it can be achieved in superlattices, reveals a way to induce otherwise unaccessible phases, possibly even with a large temperature scale.

5 pages, 4 figures

References in corpus (4)

• Magnetic effects at the interface between nonmagnetic oxides
• Polar Discontinuity Doping of the LaVO_3/SrTiO_3 Interface
• Effect of charge modulation in (LaVO3)m(SrVO3)n superlattices on the insulator-metal transition
• Spin, Orbital and Charge Order at the Interface between Correlated Oxides

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