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Two-dimensional electron system at the magnetically tunable EuO/SrTiO3<sub>3</sub> interface

Two-dimensional electron system at the magnetically tunable EuO/SrTiO33 interface

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LÖMKER, Patrick, Tobias C. RÖDEL, Timm GERBER, Franck FORTUNA, Emmanouil FRANTZESKAKIS, Patrick LE FÈVRE, François BERTRAN, Martina MÜLLER, Andrés F. SANTANDER-SYRO, 2017. Two-dimensional electron system at the magnetically tunable EuO/SrTiO33 interface. In: Physical Review B. American Physical Society. 1(6), 062001(R). ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevMaterials.1.062001

@article{Lomker2017-12-13T18:00:10ZTwodi-49486, title={Two-dimensional electron system at the magnetically tunable EuO/SrTiO33 interface}, year={2017}, doi={10.1103/PhysRevMaterials.1.062001}, number={6}, volume={1}, issn={0163-1829}, journal={Physical Review B}, author={Lömker, Patrick and Rödel, Tobias C. and Gerber, Timm and Fortuna, Franck and Frantzeskakis, Emmanouil and Le Fèvre, Patrick and Bertran, François and Müller, Martina and Santander-Syro, Andrés F.}, note={Article Number: 062001(R)} }

Lömker, Patrick Le Fèvre, Patrick Bertran, François Rödel, Tobias C. Le Fèvre, Patrick terms-of-use eng Gerber, Timm Müller, Martina Frantzeskakis, Emmanouil 2020-05-13T17:32:48Z Frantzeskakis, Emmanouil Bertran, François Fortuna, Franck 2020-05-13T17:32:48Z Santander-Syro, Andrés F. Müller, Martina Gerber, Timm Fortuna, Franck 2017-12-13T18:00:10Z Two-dimensional electron system at the magnetically tunable EuO/SrTiO3<sub>3</sub> interface We create a two-dimensional electron system (2DES) at the interface between EuO, a ferromagnetic insulator, and SrTiO3, a transparent non-magnetic 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 SrTiO3, 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. R\"odel 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. Lömker, Patrick Rödel, Tobias C. Santander-Syro, Andrés F.

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