<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt"><div>After running the phonon calculation for ZnO at gamma point, the frequencies were displayed as:<br><br> **************************************************************************<br><br> Mode symmetry, C_3v (3m) point group:<br><br> omega( 1 - 1) = -26.3 [cm-1] --> A_1 L_1 I+R<br> omega( 2 - 3) = 101.8 [cm-1] --> E L_3 I+R<br> omega( 4 - 5) = 110.3 [cm-1]
--> E L_3 I+R<br> omega( 6 - 6) = 253.3 [cm-1] --> A_1 L_1 I+R<br> omega( 7 - 7) = 379.8 [cm-1] --> A_1 L_1 I+R<br> omega( 8 - 9) = 398.5 [cm-1] --> E L_3 I+R<br> omega( 10 - 11) = 426.6 [cm-1] --> E L_3 I+R<br> omega( 12 - 12) =
540.6 [cm-1] --> A_1 L_1 I+R<br><br> **************************************************************************<br><br>I understand that A means the frequency is not degenerate and E means there is a degeneracy of 2. I just do not know what the L_1 and L_3 characters represent? Also, what does I+R mean?<br><br>Thanks,<br>Izaak Williamson<br>Physics Dept.<br>Boise State University<br></div>
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