Effects of the electron-phonon coupling activation in collision cascades

Abstract

Using the two-temperature (2T-MD) model in molecular dynamics simulations, we investigate the condition of switching the electronic stopping term o when the electron-phonon coupling is activated in the damage production due to 50 keV Ni ion cascades in Ni and equiatomic NiFe. Additionally we investigate the eect of the electron-phonon coupling activation time in the damage production. We nd that the switching condition has negligible eect in the produced damage, while the choice of the activation time of the electron-phonon coupling can aect the amount of surviving damage.