First-principles study of field emission from carbon nanotubes and graphene nanoribbons

摘要

A real-space, real-time implementation of time-dependent density functional theory is used to studyelectron field emission from nanostructures. Carbon nanotubes and graphene nanoribbons are used asmodel systems. The calculations show that carbon nanotubes with iron adsorbates have spin-polarizedemission currents. Graphene nanoribbons are shown to be good field emitters with spatial variation ofthe emission current influenced by the presence of passivating hydrogen