Fig. 4: Magneto-photoluminescence measurements of Fe-related emission.
From: Enabling room temperature ferromagnetism in monolayer MoS2 via in situ iron-doping
a, b Fe-related spontaneous emission under excitation with opposite circularly polarized light states at 4 K and 300 K. The red and black spectra correspond to excitations with σ+ and σ− polarizations, respectively. c Corresponding magnetic circular dichroism (MCD) as a function of increasing (blue circles) and decreasing (red circles) magnetic field, recorded at 4 K. d Magnetization data of Fe:MoS2 monolayers at cryogenic and room temperatures, after subtracting the diamagnetic background. A pronounced hysteresis loop is observed in Fe:MoS2 monolayers, suggesting ferromagnetism is preserved up to room temperature (300 K).
