(a) Raman
spectra taken on 4L CrI3 in the RR channel
at 10 K and at 0, 1, and 2 T, corresponding to the three magnetic
field ranges B < Bc1, Bc1 < B < Bc2, and B > Bc2, respectively. (b) Magnetic field dependence of
three modes U1,3,4. (c) A summary of the
analysis of the layered magnetism-assisted Raman scattering for four
phonon modes and three layered magnetic structures. (d) List of phonon
modes in 4L CrI3 that contribute to the layered magnetism-assisted
scattering channel with antisymmetric Raman tensors. (e) Calculated
magnetic field dependence of the four phonons of 4L CrI3, U1–4, in the RR channel. Adapted
with permission under a Creative Commons CC-BY license from ref (219). Copyright 2017 National
Academy of Sciences.