[Pw_forum] my understanding about ASR

Eduardo Ariel Menendez Proupin eariel99 at gmail.com
Thu Jun 19 21:39:36 CEST 2008


The forces are zero also if the system is rotated. So, why dont' we get 5
zero frecuencies in the crystal, as in a dimer or 6 as in a complex
molecule? Is this is forced by the periodic boundary conditions?

-- 
Eduardo Menendez
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