<HTML><HEAD><META content="text/html; charset=x-user-defined" http-equiv="Content-Type"><style type="text/css"><!--.MailHeader { font-family: "Arial"; font-size: 8pt; color: #000000; font-style: normal; font-weight: normal; text-decoration: none; }//--></style></HEAD><BODY>Hi everyone!<br ><br >I have some very simple questions to ask. <br ><br >(a) Are the energies obtained on running fqha.x at different temperatures simply the phonon free energies? <br >(b) Are the energy units Ryd/cell? And by "cell" does it mean the supercell that we had defined for calculating the phonon DOS or the primitive unit cell?<br >(c) Why do the imaginary frequencies die as we go for supercells?<br ><br >Thanks in advance.<br >Regards,<br >Tuhina<br >---------------------------------------------------------------------------------------------------------------<br >Tuhina Kelkar<br >Junior Research Fellow<br >Physical Chemistry Division,<br >National Chemical Laboratory,<br >Pune - 411 008<br >INDIA<br >Contact: 020-25902298<br >alternative email: tuhina@gmail.com<br >---------------------------------------------------------------------------------------------------------------<br ><br ></BODY></HTML>