<div dir="ltr">I calculated phonon for a molecule, but obtained negative frequencies at gamma point. What does this signify. I am providing the input file for ph.x and lambda .x There is some problem for the input file for lambda.x since it is not runing. Please provide a solution.<div><br></div><div><div>Electron-phonon coefficients </div><div> &inputph</div><div> tr2_ph=1.0d-10,</div><div> prefix = 'phn'</div><div> fildvscf='phndv',</div><div> amass(1)=10.81,</div><div> outdir='./',</div><div> fildyn='phn.dyn',</div><div> electron_phonon='interpolated'</div><div> el_ph_sigma=0.005,</div><div> el_ph_nsigma=10,</div><div> trans=.true.</div><div> /</div><div>0.0 0.0 0.0</div><div><br></div><div>input file for lambda.x<br></div><div><br></div><div>50 0.0012 1 </div><div> 1 </div><div> 0.0000000 0.0000000 0.0000000 1.00 </div><div>lambda_1</div><div>0.10 </div><div><br></div><div><br></div><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div><font color="#000000"><br></font></div><div><font face="georgia, serif" color="#000000">Naiwrit Karmodak <b> </b></font></div><div><font size="2" style="background-color:rgb(255,255,255)" face="georgia, serif" color="#000000">Research Scholar,</font></div><div><font size="2" style="background-color:rgb(255,255,255)" face="georgia, serif" color="#000000">C/o Prof E. D. Jemmis.</font></div><div><font size="2" style="background-color:rgb(255,255,255)" face="georgia, serif" color="#000000">Inorganic and Physical Chemistry,</font></div><div><font size="2" style="background-color:rgb(255,255,255)" face="georgia, serif" color="#000000">Indian Institute of Science, Bangalore-560012</font></div><div><br></div><div><br></div></div></div>
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