<div dir="ltr">Dear all,<div><br></div><div>I am very much interested in knowing LA-TA modes and grunessian parameter calculations using pwscf.</div><div><br></div><div>Is it possible to get non zero acoustic modes at Gamma point. Because, If I am applying asr rule at gamma point, the acoustic modes are zero in my case. How can we define LA-TA modes ???</div>
<div><br></div><div>Is degenerative modes (Out of First three modes) are transverse modes???</div><div><br></div><div>How to do grunessinn parameter calculations for entire phonon spectrum in PWscf???</div><div><br></div>
<div>Hope positive reply..Thanks in advance</div><div><br></div><div>with regards</div><div>S. Appalakondaiah</div><div>PhD student</div><div>University of Hyderabad</div></div>