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<div class="moz-cite-prefix">dear balabi,<br>
if you take the sigma line, (xi,xi,0), when xi=0.75 you are at the
K point<br>
if you keep going along (xi,xi,0) until xi=1.0 you get to (1,1,0)
which is the same as<br>
X=(0,0,1) because (1,1,-1) is a G vector for the fcc<br>
HTH<br>
<br>
stefano<br>
<br>
<br>
On 09/07/2017 17:23, balabi wrote:<br>
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<div>Dear nicola,</div>
<div> Thank you so much for your reply. But I don't
understand.</div>
<div> According to wikipedia's picture, the only Γ - K - X
path that I can see is like this</div>
<div> <a href="https://pasteboard.co/GA9vm6Q.png"
_src="https://pasteboard.co/GA9vm6Q.png"
moz-do-not-send="true">https://pasteboard.co/GA9vm6Q.png</a></div>
<div> I can not see any other possibility. Would you please
show me what is the other possible path for Γ - K - X in a
picture? Thank you so much.</div>
<div> And I do the phonon dispersion calculation using
q_in_band_form for matdyn.x, k path labels are default. I
thought this is standard.</div>
<div><br>
</div>
<div>best regards</div>
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