            <b>density_matrix_damping</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: 0.0<br><br>
Adds an additional linear mixing on the density matrix in combination with the Hamiltonian mixing in order to damp out the charge oscillations. Especially useful for metallic systems.</li><br>
<hr>
<a name=diis_switch><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>diis_switch</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: 0.05<br><br>
When run