Table 1 Calculated phonon frequencies (in THz) and their irreducible representation in monoclinic BaBiO3.
From: Anti-Jahn-Teller effect induced ultrafast insulator to metal transition in perovskite BaBiO3
Raman | Infrared | |||||
|---|---|---|---|---|---|---|
Symmetry | Index no. | Frequency | Symmetry | Index no. | Frequency | Strength |
Bg | 4 | 2.35 | Au | 5 | 2.78 | 2.33 × 10−11 |
5 | 2.91 | 13 | 4.29 | 1.46 × 10−8 | ||
11 | 3.45 | 15 | 5.18 | 9.49 × 10−10 | ||
22 | 8.27 | 17 | 5.74 | 8.32 × 10−10 | ||
30 | 13.55 | 18 | 6.37 | 6.02 × 10−10 | ||
27 | 11.85 | 8.77 × 10−8 | ||||
Ag | 7 | 2.99 | Bu | 8 | 3.07 | 5.60 × 10−12 |
9 | 3.27 | 10 | 3.40 | 5.92 × 10−10 | ||
16 | 5.54 | 12 | 4.28 | 9.35 × 10−9 | ||
23 | 8.51 | 14 | 4.50 | 5.42 × 10−9 | ||
24 | 9.17 | 19 | 6.48 | 9.10 × 10−9 | ||
25 | 11.36 (Breathing) | 20 | 6.66 | 4.57 × 10−9 | ||
29 | 13.35 | 21 | 7.59 | 7.72 × 10−9 | ||
26 | 11.71(IR) | 1.65 × 10−7 | ||||
28 | 12.42 | 8.89 × 10−8 | ||||
