Hi,<br>I am making calculations for a nanocrystal, isolated system in a supercell, only gamma point. I have 10 angstrom separation between a nanocrystal border and the border of the closest image. <br> I am a bit surprised to obtain a non integer value of the total magnetization. <br>
<br>total energy = -9085.20537799 Ry<br> Harris-Foulkes estimate = -9085.20537567 Ry<br> estimated scf accuracy < 0.00001138 Ry<br><br> total magnetization = 2.79 Bohr mag/cell<br>
absolute magnetization = 3.11 Bohr mag/cell<br clear="all"><br>There is not SCF convergence yet, but the restart is waiting in a queue. I think that the magnetization should be integer. <br>Should be?<br>In this case, with an even number of electrons, it should be 0, 2, 4, or 2N. The reason for getting a non integer magnetization may be <br>
a) supercell not large enough<br>b) smearing. occupations = 'smearing', smearing = 'cold', degauss = 0.02,<br>c) other?<br><br>And the solution is<br>a) Larger supercell<br>b) fixed occupation, but not if the system is metallic<br>
c) tot_magnetization = 2, ! or any even numbe<br>d) other<br><br>Thanks for the help<br><br>Best regards<br><br><br><div><br></div>
<div><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>