Interface Engineering to Create a Strong Spin Filter Contact to Silicon

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2016
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Caspers, Christian
Gloskovskii, Andrei
Gorgoi, Mihaela
Besson, Claire
Luysberg, Martina
Rushchanskii, Konstantin Z.
Ležaić, Marjana
Fadley, Charles S.
Drube, Wolfgang
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Scientific reports. Springer Nature. 2016, 6(1), 22912. eISSN 2045-2322. Available under: doi: 10.1038/srep22912
Zusammenfassung

Integrating epitaxial and ferromagnetic Europium Oxide (EuO) directly on silicon is a perfect route to enrich silicon nanotechnology with spin filter functionality. To date, the inherent chemical reactivity between EuO and Si has prevented a heteroepitaxial integration without significant contaminations of the interface with Eu silicides and Si oxides. We present a solution to this long-standing problem by applying two complementary passivation techniques for the reactive EuO/Si interface: (i) an in situ hydrogen-Si (001) passivation and (ii) the application of oxygen-protective Eu monolayers-without using any additional buffer layers. By careful chemical depth profiling of the oxide-semiconductor interface via hard x-ray photoemission spectroscopy, we show how to systematically minimize both Eu silicide and Si oxide formation to the sub-monolayer regime-and how to ultimately interface-engineer chemically clean, heteroepitaxial and ferromagnetic EuO/Si (001) in order to create a strong spin filter contact to silicon.

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ISO 690CASPERS, Christian, Andrei GLOSKOVSKII, Mihaela GORGOI, Claire BESSON, Martina LUYSBERG, Konstantin Z. RUSHCHANSKII, Marjana LEŽAIĆ, Charles S. FADLEY, Wolfgang DRUBE, Martina MÜLLER, 2016. Interface Engineering to Create a Strong Spin Filter Contact to Silicon. In: Scientific reports. Springer Nature. 2016, 6(1), 22912. eISSN 2045-2322. Available under: doi: 10.1038/srep22912
BibTex
@article{Caspers2016-03-15Inter-49987,
  year={2016},
  doi={10.1038/srep22912},
  title={Interface Engineering to Create a Strong Spin Filter Contact to Silicon},
  number={1},
  volume={6},
  journal={Scientific reports},
  author={Caspers, Christian and Gloskovskii, Andrei and Gorgoi, Mihaela and Besson, Claire and Luysberg, Martina and Rushchanskii, Konstantin Z. and Ležaić, Marjana and Fadley, Charles S. and Drube, Wolfgang and Müller, Martina},
  note={11 pages of scientific paper, 10 high-resolution color figures. Supplemental information on the thermodynamic problem available (PDF). High-resolution abstract graphic available (PNG). Original research (2016) Article Number: 22912}
}
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11 pages of scientific paper, 10 high-resolution color figures. Supplemental information on the thermodynamic problem available (PDF). High-resolution abstract graphic available (PNG). Original research (2016)
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