Room temperature magnetism in LaVO3/SrVO3 superlattices by geometrically confined doping
| Autor: | Luders, U., Sheets, W. C., David, A., Prellier, W., Fresard, R. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 80, 241102(R) (2009) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.80.241102 |
| Popis: | 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. Comment: 5 pages, 4 figures |
| Databáze: | arXiv |
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