Hydrogen interaction with dislocations in Si

An H plasma has a remarkable effect on dislocation mobility in silicon, red ucing its activation energy to 1.2 eV. Applying density functional theory t o the interactions of H and H? With the core of the 90 degrees partial disl ocation in Si, we have identified a path for motion involving kink formatio n and migration at hydrogenated core bonds which conforms exactly to the ex perimentally measured activation energy.