Numerical simulation of electron density in amorphous silicon showing the migration of a hydrogen atom (blue) from atom A to atom B (1-5). The last panel plots the distance from the hydrogen atom to the nearest silicon atom as a function of time.
From the article:
Diffusion Mechanism of Hydrogen in Amorphous Silicon: Ab Initio Molecular Dynamics SimulationY.-S. Su and S. T. Pantelides
Phys. Rev. Lett. 88, 165503 (2002)
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