<div dir="ltr"><div>Dear Developers and users, <br></div><div><br></div><div>I am calculating the
transport properties of transition metal dichalcogenides as a function
of deformation. The phonon dispersion plot shows negative and positive
frequencies for different ASR(crystal or simple tag in matdyn.x
calculations). Here, we are using the acoustic sum rule (ASR) to remove
spurious negative frequency at gamma.<br></div><div><br></div><div>The
attached plots are for a strained structure, where I used DFPT for
plotting phonon dispersion. In the left figure, I used the 'simple' tag
for ASR in matdyn.x and 'crystal' in right.</div><div><br></div><div>There are significant differences in the two plots. Could anyone help me in selecting the correct ASR tag phonon calculations? <br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><b><font><font>Best Regards</font></font></b></div><div><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font><font>Zimmi Singh</font></font></span></span></div><div><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><i><font><font>Research_Scholar <br></font></font></i></span></span></div><div><span style="color:rgb(68,68,68)"><i>Department of Metallurgical and Materials Engineering<br>
Indian Institute of Technology, Kharagpur<br>
Kharagpur, India</i></span></div><div><span style="color:rgb(68,68,68)"><i>Mob No. 9935804727</i></span><br></div><div><font><font><br></font></font></div></div></div></div>