Fig. 2: Magnetic field-dependent Raman spectra of CrI3.
From: Distinct magneto-Raman signatures of spin-flip phase transitions in CrI3

Spectra are shown from 0 T to 3 T (B ⊥ ab plane) at T = 9 K where P1 and P2 disappear above B = 2.0 T, whereas \({\mathrm{A}}_{\mathrm{g}}^1\) and \({\mathrm{A}}_{\mathrm{g}}^6\) appear despite being forbidden in the xy polarization configuration. Yellow (green) shading highlights changes in P1, P2 (\({\mathrm{A}}_{\mathrm{g}}^1\), \({\mathrm{A}}_{\mathrm{g}}^6\)) as the magnetic field is varied. A vertical offset was applied to spectra at different field values. xx spectrum at B = 0 T shown at top for comparison.