Figure 2.

μ-PL measurement under a magnetic field applied perpendicular to the plane of the WSe₂ monolayer, which is deposited over a BGB substrate doped with x percent of Tb (schematic drawing in center). (a, b) Color maps of the circularly polarized PL spectra as a function of the magnetic field for the WSe₂ samples on glass with 0% and 16% Tb³⁺, respectively. The sample was excited with a linearly polarized laser, and the σ⁺ component was collected. We note that SPE emissions for both samples are strongly polarized for positive magnetic fields. The PL intensity of the WSe₂/BGB-16Tb sample, at the same experimental conditions, was about 3× stronger, and they showed more distinguishable doublets than the WSe₂/BGB-0Tb sample. (c, d) Portion of the results around the D′1 (WSe₂/BGB-0Tb) and D1 and D2 (WSe₂/BGB-16Tb) doublet regions observed in (a) and (b), with their respective effective g-factors. The energy shift for each doublet branch was fitted using eq 1.