Two-dimensional electron system at the magnetically tunable ${\mathrm{EuO}\text{/}\mathrm{SrTiO}}_{3}$ interface - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phys.Rev.Mater. Année : 2017

Two-dimensional electron system at the magnetically tunable ${\mathrm{EuO}\text{/}\mathrm{SrTiO}}_{3}$ interface

Patrick Lömker
  • Fonction : Auteur
Timm Gerber
  • Fonction : Auteur
Franck Fortuna
Patrick Le Fèvre
François Bertran
Martina Müller
  • Fonction : Auteur

Résumé

We create a two-dimensional electron system (2DES) at the interface between EuO, a ferromagnetic insulator, and SrTiO 3 , a transparent nonmagnetic insulator considered the bedrock of oxide-based electronics. This is achieved by a controlled in situ redox reaction between pure metallic Eu deposited at room temperature on the surface of SrTiO 3 —an innovative bottom-up approach that can be easily generalized to other functional oxides and scaled to applications. Additionally, we find that the resulting EuO capping layer can be tuned from paramagnetic to ferromagnetic, depending on the layer thickness. These results demonstrate that the simple, novel technique of creating 2DESs in oxides by deposition of elementary reducing agents [T. C. Rödel et al., Adv. Mater. 28, 1976 (2016)] can be extended to simultaneously produce an active, e.g., magnetic, capping layer enabling the realization and control of additional functionalities in such oxide-based 2DESs.

Dates et versions

hal-01851298 , version 1 (29-07-2018)

Identifiants

Citer

Patrick Lömker, Tobias C. Rödel, Timm Gerber, Franck Fortuna, Emmanouil Frantzeskakis, et al.. Two-dimensional electron system at the magnetically tunable ${\mathrm{EuO}\text{/}\mathrm{SrTiO}}_{3}$ interface. Phys.Rev.Mater., 2017, 1 (6), ⟨10.1103/PhysRevMaterials.1.062001⟩. ⟨hal-01851298⟩
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