<div dir="ltr">Maybe the following note in file Doc/release-notes is relevant for your problem?<div>---</div><div>...</div><div>Fixed in 6.8 version:</div><div>...<br> * The rho => 0 limit of spin-polarized BEEF XC energy was not correct,<br></div> leading to funny total energy numbers and problems in structural optimization<br> (fixed by Gabriel S. Gusmão, Georgia Tech)<div>---</div><div><br></div><div>Paolo</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Nov 18, 2021 at 3:06 PM Tom Demeyere <<a href="mailto:T.Demeyere@soton.ac.uk">T.Demeyere@soton.ac.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Dear users,<br>
<br>
I am trying to calculate binding energies using the BEEF-vdW and the RISM formalism (QE-6.7), for this aim I need to compute different molecules (H2O, O2, …) in H2O with HCl 1M.<br>
<br>
O2 shows large energy fluctuations when I ask for:<br>
<br>
- input_dft: “BEEF-vdW”<br>
- nspin = 2<br>
<br>
(The calculation converges when asking for nspin = 0, or changing the functional to PBE.)<br>
<br>
Typical output:<br>
<br>
…<br>
<br>
iteration # 8 <br>
...<br>
total energy = -180.99829260 Ry<br>
estimated scf accuracy < 0.00029814 Ry<br>
…<br>
iteration # 9 <br>
...<br>
total energy = -151.60027495 Ry<br>
estimated scf accuracy < 0.00021978 Ry<br>
…<br>
iteration # 10<br>
total energy = -139.03397732 Ry<br>
estimated scf accuracy < 0.00010331 Ry<br>
…<br>
<br>
The calculation ends at some point with: “history already reset at previous step: stopping”, the final energy given is wrong.<br>
<br>
Full input:<br>
<br>
&CONTROL<br>
calculation = 'relax'<br>
etot_conv_thr = 1.0000000000d-05<br>
forc_conv_thr = 5.0000000000d-04<br>
pseudo_dir = '/work/e89/e89/td5g20/PseudoPotentials/'<br>
tprnfor = .true.<br>
verbosity = 'high'<br>
trism = .true.<br>
/<br>
&SYSTEM<br>
ecutwfc = 60, ecutrho = 480<br>
occupations = ‘smearing’, smearing = ‘fd’, degauss = 0.01<br>
ibrav = 1, A = 20<br>
ntyp = 1, nat = 2<br>
nosym = .true.<br>
input_dft = "BEEF-vdW"<br>
/<br>
&ELECTRONS<br>
conv_thr = 1.00D-12<br>
mixing_mode = ‘local-TF’, mixing_beta = 0.2<br>
/<br>
&IONS<br>
ion_dynamics = "bfgs"<br>
/<br>
&RISM<br>
nsolv = 3 <br>
closure = 'kh' <br>
tempv = 298.15<br>
ecutsolv = 160.0<br>
starting1d = 'zero' <br>
rism1d_conv_thr = 1.0e-8 <br>
rism1d_maxstep = 100000 <br>
mdiis1d_size = 20 <br>
mdiis1d_step = 0.1<br>
starting3d = 'zero'<br>
rism3d_maxstep = 10000 <br>
rism3d_conv_thr = 1.0e-6 <br>
rism3d_conv_level = 0.5 <br>
mdiis3d_size = 20 <br>
mdiis3d_step = 0.8<br>
solute_lj(1) = 'none'<br>
solute_epsilon(1) = 0.1554<br>
solute_sigma(1) = 3.1660<br>
/<br>
ATOMIC_SPECIES<br>
O 15.999 O.pbe-n-kjpaw_psl.1.0.0.UPF<br>
ATOMIC_POSITIONS angstrom<br>
O 1.6891044673 1.7570200245 0.6442147904<br>
O 2.3377455327 0.7138399755 0.6439152096<br>
K_POINTS gamma<br>
SOLVENTS mol/L<br>
H2O -1.0 H2O.spc.MOL<br>
H3O+ 1.0 H3O+.aq.MOL<br>
Cl- 1.0 Cl-.aq.MOL<br>
<br>
Best regards,<br>
Tom Demeyere<br>
<br>
_______________________________________________<br>
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<a href="https://lists.quantum-espresso.org/mailman/listinfo/users" rel="noreferrer" target="_blank">https://lists.quantum-espresso.org/mailman/listinfo/users</a></blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div>Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,<br>Univ. Udine, via delle Scienze 206, 33100 Udine, Italy<br>Phone +39-0432-558216, fax +39-0432-558222<br><br></div></div></div></div></div>