alog to k0 in Kerker preconditioning for metallic systems. Helps to damp charge oscillations to ensure better SCF convergence.</li><br>
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<a name=level_shifting_energy><li>                 <span style="display:inline-block;background:#EEEEEE;width:400px">               <b>level_shifting_energy</b>  </span>  
<br><br>
<i>Optional</i><br>
Default: 0.0<br><br>
Sets the energy shift up of the unoccupied states. Should help the convergence in the case of small HOMO-LUMO gaps.</li><br>
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<a name=min_overlap