<div dir="ltr"><div>From PHonon/examples/REAME:<br><br>example05:<br> This example shows how to use pw.x and ph.x to calculate the Raman<br> tensor for AlAs.<br><br><br></div>Paolo</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 10, 2016 at 6:49 AM, WANG YUANQING <span dir="ltr"><<a href="mailto:yuanqing.wang@riken.jp" target="_blank">yuanqing.wang@riken.jp</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Drear all,<br>
<br>
Hi. Sorry to send this email again. I guess last time no one noticed my email, so now I send it again.<br>
<br>
Today, I examined the examples in PHonon/examples/examples15/. I found one problem about the calculation of raman spectra for ZnO. In the reference the file "zno.dm.out" writes:<br>
<br>
# mode [cm-1] [THz] IR<br>
1 0.00 0.0000 0.0000<br>
2 0.00 0.0000 0.0000<br>
3 0.00 0.0000 0.0000<br>
4 0.00 0.0000 0.0000<br>
5 0.00 0.0000 0.0000<br>
6 0.00 0.0000 0.0000<br>
7 47.34 1.4193 0.0000<br>
8 105.62 3.1664 0.0000<br>
9 157.77 4.7300 0.0000<br>
10 214.72 6.4370 0.0000<br>
11 276.27 8.2825 0.0000<br>
12 337.53 10.1189 0.0000<br>
<br>
In this output I cannot find the intensity of Raman spectra. However, the plot program actually try to plot the raman intensity, as shown below:<br>
<br>
plot 'plotdata_zno.dat' u ($2):($3) title ' ZnO-RAMAN' w i lw 2<br>
<br>
It puzzles me a a lot. Is the column $3 the Raman intensity? I think it is not.<br>
<br>
Then, I tried to add "lraman=.true.," in the input for PHonon calculation. But it says "no elec. field with metals".<br>
<br>
Can anyone tell me how to get the raman intensity?<br>
<br>
Thank you in advance.<br>
<br>
Best regards,<br>
<br>
Yuanqing Wang<br>
<br>
<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 208, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>
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