Tunnel Contacts for Spin Injection into Silicon: The Si-Co Interface with and without a MgO Tunnel Barrier—A Study by High-Resolution Rutherford Backscattering

Figure 8

Sub-nanometer thick MgO: HRBS spectra before and after MgO evaporation. HRBS spectra at the Si edge before MgO evaporation (solid circles) and RUMP simulation (solid line) of the clean Si. After MgO evaporation: HRBS spectra at the Si, Mg, and O edges (open circles) and RUMP simulation (solid line) of the 7.7 ML thin MgO layer as prepared on the Si (100) surface.