Ferromagnetism in Mn-doped III - V Nanowires

Using ab initio methods based on the density functional theory, we study the stability of Mn-doped GaAs and InAs nanowires as well as their electronic and magnetic properties. The model nanowires were constructed using bulk atomic positions of either zinc-blende or wurtzite structures along (111) and (0001) crystallographic directions, respectively. The calculations show that in such one-dimensional structures the distribution of Mn ions as well as their mutual spin alignment depends crucially on the crystallographic structure of the wire.