>are you using the latest cvs version? apparently there is a problem<br>
>with the new symmetrization algorithm that will be fixed ASAP.<br><br>The results I posted are from espresso-4.0.5, although I originally saw this problem with espresso-4.1.1 in a different system (AlAs on a 2x2x2 shifted grid). <br>
<br>As for what Lorenzo said, it makes sense with what I'm seeing. The energy breakdowns for the 200 Ry and the 2000 Ry cases are shown below:<br><br>For 200 Ry:<br>--------------------------------<br>! total energy = -14.59208467 Ry<br>
Harris-Foulkes estimate = -14.59208467 Ry<br> estimated scf accuracy < 3.9E-11 Ry<br><br> The total energy is the sum of the following terms:<br><br> one-electron contribution = 5.58227319 Ry<br>
hartree contribution = 1.67255719 Ry<br> xc contribution = -5.04795028 Ry<br> ewald contribution = -16.79896478 Ry<br> Fock energy 1 = 0.00000000 Ry<br> Fock energy 2 = 0.00000000 Ry<br>
Half Fock energy 2 = 0.00000000 Ry<br>-------------------------<br>For 2000 Ry:<br>-------------------------<br>! total energy = -14.11008918 Ry<br> Harris-Foulkes estimate = -14.11008918 Ry<br>
estimated scf accuracy < 1.0E-11 Ry<br><br> The total energy is the sum of the following terms:<br><br> one-electron contribution = 6.07256114 Ry<br> hartree contribution = 1.58024935 Ry<br>
xc contribution = -4.96393489 Ry<br> ewald contribution = -16.79896478 Ry<br> Fock energy 1 = 0.00000000 Ry<br> Fock energy 2 = 0.00000000 Ry<br> Half Fock energy 2 = 0.00000000 Ry<br>
-------------------<br><br>So you can see the one-electron contribution going up and the hartree contribution going down as Lorenzo as argued.<br><br>Brad<br>