Hi, <br>Why are there two Fermi energies in certain spin-polarized calculations ? <br>
<br>input starting_magnetization(1) = 0.0,<br> starting_magnetization(2) = 0.5,<br>output the Fermi energy is 6.1598 ev<br> ! total energy = -502.92538790 Ry<br>
<br>input tot_magnetization = 1<br clear="all">output the spin up/dw Fermi energies are 6.3821 6.1598 ev<br> ! total energy = -502.92538790 Ry<br><br>What is the meaning of the spin up Fermi level in the second case? <br>
<div><br>This numbers are for a 64 atoms Si unit cell with one Si replaced by Al,
and only one k-point, but the same happens with more k-points. I also
used Fermi smearing with a very low smearing. <br>
There is a difference if I set the starting magnetization or the total
magnetization, with pw.x version 4.2.1. However, despite reporting
different Fermi levels, the total energy and magnetization are equal.
Also are equal KS energies, at least around the Fermi levels.<br><br></div>
<div>Thanks,<br><br></div>Eduardo Menendez<br>Departamento de Fisica<br>Facultad de Ciencias<br>Universidad de Chile<br>Phone: (56)(2)9787439<br>URL: <a href="http://fisica.ciencias.uchile.cl/%7Eemenendez" target="_blank">http://fisica.ciencias.uchile.cl/~emenendez</a><br>