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Table 2
Comparison of the fitting parameters of corundum for the A2u-type modes (E∥c) at different temperatures (j = 1,2).
| j | T(K) | ΩTOj | γTOj | ΩLOj | γLOj | ϵ∞ |
| (cm-1) | (cm-1) | (cm-1) | (cm-1) | |||
|
|
||||||
| 1 | 300 | 399.68 | 4.68 | 511.05 | 1.42 | 2.9 |
| 551 | 394.76 | 11.2 | 508.09 | 2.79 | 2.91 | |
| 738 | 391.91 | 18.58 | 505.24 | 2.88 | 2.91 | |
| 928 | 390.54 | 22.57 | 502.65 | 3.22 | 2.97 | |
| 2 | 300 | 481.58 | 3.42 | 480.93 | 3.21 | − |
| 551 | 476.38 | 7.83 | 475.7 | 6.99 | ||
| 738 | 472 | 13.3 | 471 | 12.13 | ||
| 928 | 471.19 | 17.11 | 469.84 | 16.32 | ||
| 3 | 300 | 582 | 4.17 | 884.75 | 21.57 | − |
| 551 | 577.36 | 8.93 | 882.32 | 35.96 | ||
| 738 | 573.5 | 11.37 | 878.47 | 44.71 | ||
| 928 | 573.35 | 15.74 | 874.39 | 49.24 | ||
Notes.The third oscillator could not be verified as an A2u-type mode.
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