  Two-dimensional chromium oxide fluoride CrOF sheet was studied based on
density functional theory. The investigation indicates that the CrOF sheet is
an intrinsic ferromagnetic semiconductor. The calculated low cleavage energy
implies that the ferromagnetic semiconductor can be exfoliated from its bulk
form. The corresponding Curie temperature is 150 K. In particular, the Curie
temperature increases up to 410 K under hole doping and the CrOF sheet becomes
a half-metal. The versatile electronic and magnetic properties indicate that
the two-dimensional CrOF sheet can be a promising candidate for next-generation
spintronic devices.
