Phonon dispersion Points/Modes question

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1. Sep 29, 2015

Jeff_2016

2. Sep 29, 2015

Daz

3. Sep 29, 2015

Jeff_2016

Perfect, thank you so much!

4. Sep 30, 2015

Jeff_2016

Thanks again for replying, I just have one more question. How do I find the elements of the k-vector? I assume if it is in the [1 0 0] plane and K=2pi/a that kx=2pi/a, ky=0, kz=0.

5. Sep 30, 2015

Daz

That's right. Don't forget that that was just an example. In general you have kx=2PI/a, ky=2PI/b, kz=2PI/c and if [100] is a plane in real space the k-space vector is perpendicular to that plane. (An easy way to get a,b and c is to sketch a little unit cell on a scrap of paper.)