Spin-polarized surface state in EuO(100)
| Autor: | Carsten Busse, Thomas Michely, Jürgen Klinkhammer, Sven Runte, Fabian Craes, Martin Schlipf |
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| Rok vydání: | 2013 |
| Předmět: |
Surface (mathematics)
Materials science Condensed matter physics Spin polarization General Physics and Astronomy law.invention Condensed Matter::Materials Science law ddc:550 Curie temperature Condensed Matter::Strongly Correlated Electrons Density functional theory Scanning tunneling microscope Spin (physics) Spectroscopy Electron scattering |
| Zdroj: | Physical review letters 112(1), 016803 (2014). doi:10.1103/PhysRevLett.112.016803 |
| ISSN: | 1079-7114 |
| Popis: | High-quality films of the ferromagnetic semiconductor EuO are grown on epitaxial graphene on Ir(111) and investigated in situ with scanning tunneling microscopy and spectroscopy. Electron scattering at defects leads to standing-wave patterns, manifesting the existence of a surface state in EuO. The surface state is analyzed at different temperatures and energies. We observe a pronounced energy shift of the surface state when cooling down below the Curie temperature ${T}_{\mathit{C}}$, which indicates a spin polarization of this state at low temperatures. The experimental results are in agreement with corresponding density functional theory calculations. |
| Databáze: | OpenAIRE |
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