<span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 12.5px; border-collapse: collapse; color: rgb(80, 0, 80); ">Dear Huang:</span><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 12.5px; border-collapse: collapse; color: rgb(80, 0, 80); ">I think you are right;)</span></div>
<div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 12.5px; border-collapse: collapse; color: rgb(80, 0, 80); ">Thanks a lot :P</span></div><div><font class="Apple-style-span" color="#500050" face="arial, sans-serif" size="4"><span class="Apple-style-span" style="border-collapse: collapse; font-size: 15px;"><br>
</span></font></div><div><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 12.5px; border-collapse: collapse; color: rgb(80, 0, 80); "><br></span></div><div><div><br><div class="gmail_quote">
On Fri, Apr 29, 2011 at 11:50 AM, lfhuang <span dir="ltr"><<a href="mailto:lfhuang@theory.issp.ac.cn">lfhuang@theory.issp.ac.cn</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<div>Dear Wang:
<br><div class="im">
<br>
<font color="#444444">> LO-TO splitting always exists in Brillouin zone, but two points are worth
<br>
</font><font color="#444444">> </font><font color="#444444">> noting:
<br>
</font><font color="#444444">> >
<br>
</font><font color="#444444">> I do not think so. I do not find any LO-TO splitting at the X and R point of
<br>
</font></div><font color="#444444">> Brillouin zone of cubic.
<br>
<br>
This could depend on the definition of "LO-TO splitting", which I meant "the reduction of the LO-TO degeneracy".
<br>
If it is defined to be the splitting due to the long-range electric force on LO, it will disappear in BZ zone.
<br><div class="im">
<br>
Best Wishes!
<br>
Yours Sincerely
<br>
L. F. Huang
<br></div><div class="im">
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L.F.Huang(黄良锋) DFT and phonon physics
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Add: Research Laboratory for Computational Materials Sciences,
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<br></blockquote></div><br><br clear="all"><br>-- <br>____________________________________<br>Hui Wang<br>School of physics, Fudan University, Shanghai, China<br>
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