Dear All,<br><br>I have a quick question:<br><br>When doing phonon calculation for a unit cell, we need to set up a qpoints mesh. This mesh is built also based on M-K scheme, so the resulting coordinates and weight should be exactly the same as those for k points if the input grid is the same? say 5*5*5 for a cubic cell.<br>
<br>Is my understanding correct? If so, why do we need to have such an additional setting of q points rather than just using k points mesh for both?<br><br>Thanks.<br><br>Caloma Ditrica<br><br>PhD student from Penn State University<br>