Table 2 CrI3 vibrational modes frequencies (in cm−1) at 300 K.

From: Low energy electrodynamics of CrI3 layered ferromagnet

Raman-active

IR-active

IR-active (two-phonons)

52 [50.1] (\(E_{g}\))

60 [56.8] (\(A_{2u}\))

276 (\(230E_u+52E_g\))

79 [76.1] (\(A_{1g}\))

82 [80.3] (\(E_u\))

291 (\(230E_g+60A_{2u}\))

99 [101.8] (\(E_{g}\))

113 [114.3] (\(E_u\))

310 (\(230E_u+79A_{1g}\))

105 [107.5] (\(E_g\))

133 [133.3] (\(A_{2u}\))

326 (\(230E_u+99E_g\))

128 [129] (\(A_{1g}\))

230 [225.3] (\(E_u\))

337 (\(230E_u+105E_g\))

230 [241.1] (\(E_g\))

 

347 (\(230E_g+113E_u\))

  1. The values in the quadratic brackets highlight the in-plane Raman- and IR-active modes at 0 K, as obtained by DFT results31. The first column shows the experimental Raman modes61,63. The IR-active experimental modes obtained in this work are shown in the second and third columns.
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