[Pw_forum] a question about phonon dos

Peter Winey peterwiney at gmail.com
Thu Aug 3 17:41:44 CEST 2006

Dear all,

For those of you who knows program "matdyn.x" well, I have a question.

In the description part (head) of the program, I noticed the following:
"dos if .true. calculate phonon dos using tetrahedra and a uniform q-point
grid. NB: may not work properly in noncubic materials."

Could someone kindly explain to me what "using tetrahedra" means?
if the program does not work properly for noncubic materials, how to get the
proper phonon dos?

Thanks in advance!

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