my question is just to confirm the format used to write phonon modes at end of output files of Ph.x. for some structures<div>it is</div><div><div> omega( 25 - 27) = 553.2 [cm-1] --> T_1u G_15 G_4- I </div>
<div> omega( 28 - 29) = 588.8 [cm-1] --> E_g G_12 G_3+ R </div><div> omega( 30 - 30) = 829.2 [cm-1] --> A_1g G_1 G_1+ R </div></div><div>here only one Eg line is there</div><div><br>
</div><div>but for some we have Eg and Eg* type thing i.e a why a degenerate frequency is written two times.what are these eg* Eu* things</div><div><div> omega( 28 - 29) = 700.2 [cm-1] --> E_u I </div>
<div> omega( 28 - 29) = 700.2 [cm-1] --> E_u* I </div><div> omega( 30 - 30) = 780.0 [cm-1] --> A_g R </div></div><div><div> omega( 22 - 23) = 425.2 [cm-1] --> E_g R </div>
<div> omega( 22 - 23) = 425.2 [cm-1] --> E_g* R </div></div><div>also the G symbols are not here </div><div><br></div><div>why this is so</div><div>Are both correct or there is some mistake in the second one</div>
<div><br clear="all">Karandeep<br>Research Scholar<br>Physics Department,<br>IIT, Delhi<br>
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