Home › Forums › density functional theory › the Schrödinger equation – 1 › Interactions This topic has 0 replies, 1 voice, and was last updated 2 years, 2 months ago by Cedric. Viewing 1 post (of 1 total) Author Posts October 4, 2022 at 12:20 pm #6864 CedricParticipant Electromagnetic interaction, because a solid is defined as a system of positive nuclei and negatively charged electrons. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In