Possibility of Observing Self-Interstitials in Cu and Al by Neutron Scattering

Abstract

The librational modes of the $〈100〉$-split interstitial in fcc metals can undergo resonant hybridization with the phonons of the perfect crystal. As in the analogous case of KCl: C${\mathrm{N}}^{-}$, this hybridization leads to effects which can be observed by inelastic neutron scattering at concentrations orders of magnitude smaller than those required for the observation of effects introduced by simple substitutional impurities.