Table 4 The defect migration barrier in bulk Si, Ge, and Si/Ge superlattice. V X : X vacancy (X = Si or Ge)
Defect type | Direction | Migration barrier (eV) | ||
---|---|---|---|---|
Si/Ge SL | Bulk Ge | Bulk Si | ||
VSi | [100] | 3.92 | – | 4.32 |
[110] | 2.14 | – | 2.12, 2.85a | |
[111] | 0.49 | – | 0.11 | |
VGe | [100] | 2.87 | 3.67 | – |
[110] | 1.39 | 1.94, 2.1a | – | |
[111] | 0.61 | 0.14 | – |