Figure 15.

(a) Raman spectra taken on bulk CrI₃ in LL and LR channels at 10 K and 0 T. P(A_g), P(E_g), and M_1,2 label phonon modes of A_g, E_g symmetry and coupled with layered magnetism, respectively. (b) Color map of magnetic field dependent Raman spectra taken in the LL channel. (c) Raman spectra taken on bulk CrI₃ in LL and LR channels at 7 T. (d–f) Magnetic field dependence of selected A_g and E_g phonon modes. (g) A schematic illustration of the monoclinic distortion across the layered surface AF to FM transition. Adapted with permission under a Creative Commons CC BY 4.0 license from ref (218). Copyright 2020 American Physical Society.