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Magnetisms in -type monolayer gallium chalcogenides (GaSe, GaS)
Magnetisms in -type monolayer GaX (X=S,Se) is investigated by performing
density-functional calculations. Due to the large density of states near the
valence band edge, these monolayer semiconductors are ferromagnetic within a
small range of hole doping. The intrinsic Ga vacancies can promote local
magnetic moment while Se vacancies cannot. Magnetic coupling between
vacancy-induced local moments is ferromagnetic and surprisingly long-range. The
results indicate that magnetization can be induced by hole doping and can be
tuned by controlled defect generation.Comment: 5 page