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 1

The initial Co adsorption sites T4, HB, HH, and T3 on the Si (100)-(2 × 1) surface at room temperature. B2 is the “cave site” for Mg mentioned in Section 3.3.