Void and helium bubble stability in amorphous silicon during heavy-ion bombardment was investigated using molecular dynamics simulations. He bubbles with gas pressures equal to or greater than 0.1 kbar were found stable under isotropic 2 keV Xe bombardment at 10 K. The internal He pressure prevented the penetration of liquid Si into the open volume during the displacement cascade. It was found that the elongated morphology was very stable with respect to closure under Xe bombardment.
ASJC Scopus subject areas
- Physics and Astronomy(all)