  Structural and electronic properties of pristine and transition metal doped
ZnS monolayer are investigated within the framework of density functional
theory. The pristine ZnS monolayer is showing direct band gap of about 2.8 eV.
The investigated transition metal doping showed the transition from
non-magnetic semiconductor to a magnetic system e.g. magnetic semiconductor for
Co doped ZnS and half metal for Ni doped ZnS monolayers. The Co doped ZnS
monolayer showed higher formation energy, confirming the strong bonding than
that of Ni doped ZnS monolayer. The electron difference density shows the
charge sharing between transition metal (Ni and Co) and S, confirming the
covalent bond formation.
