  The structural, electronic and magnetic properties of single layers of Iron
Dichloride (FeCl$_{2}$) were calculated using first principles calculations. We
found that the 1T phase of the single layer FeCl$_{2}$ is 0.17 eV/unit cell
more favorable than its 1H phase. The structural stability is confirmed by
phonon calculations. We found that 1T-FeCl$_{2}$ possess three Raman-active
(130, 179 and 237 cm$^{-1}$) and one Infrared-active (279 cm$^{-1}$) phonon
branches. The electronic band dispersion of the 1T-FeCl$_{2}$ is calculated
using both GGA-PBE and DFT-HSE06 functionals. Both functionals reveal that the
1T-FeCl$_{2}$ has a half-metallic ground state with a Curie temperature of 17
K.
