Fig. 3: Optically detected electron spin resonance of Defect A at room temperature under 100-μW laser excitation and 25-dBm MW power.
From: Coherent control of an ultrabright single spin in hexagonal boron nitride at room temperature

a ODMR spectra of Defect A measured at different external magnetic field. b Dependence of ODMR resonance frequencies on the magnetic field (B ∣∣ c). The black dots are experimental results extracted from (a), based on which we fit the g factor of Defect A to be 2.011 ± 0.012. The red dots are ab initio theoretical predictions.