<div dir="ltr"><div><div>Dear Users,<br><br></div>I am trying to calculate born effective charge for Bi atom in BiFeO3. I followed the tutorial for GaAs as BiFeO3 is having non orthogonal lattice vectors. I used berrypi with -s option as it consists of magnetic ion. But after changing the position of Bi atom by 0.001, when I put the command ''x dstart'' to initialize the electron density, it is showing 'rot-def' error. Please help.<br><br></div>Thanks in advance.<br clear="all"><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr">Lokanath Patra<div>Ph.DÂ Scholar</div><div>Dept. of Physics</div><div>School of Applied and Basic Sciences</div><div>Central University of Tamil Nadu</div><div>Thiruvarur</div><div>Tamil Nadu - 610101</div><div>Ph no - +91-8675834507</div></div></div>
</div></div></div></div>