TURBOMOLE Users Forum
TURBOMOLE Modules => Molecular Properties, Wavefunction Analysis, and Interfaces to Visualization Tools => Topic started by: jbaltrus on May 02, 2013, 05:38:57 PM
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I am performing ground state spin unpaired triplet ridft calculations and plotting properties with $pointval fmt=cub. I get td and sd files, but sd doesn't contain any plot (that is the file is populated but no net spin gets visualized), but in my calculations I clearly see that there are two unpaired electrons, so I should see some spin density since they are not paired. These two things contradict each other but I can't quite understand what's going on
alpha:
irrep 422a 423a 424a 425a 426a
eigenvalues H -0.21785 -0.21165 -0.20815 -0.20067 -0.19771
eV -5.9282 -5.7594 -5.6640 -5.4606 -5.3800
occupation 1.0000 1.0000 1.0000 1.0000 1.0000
irrep 427a 428a 429a 430a 431a
eigenvalues H -0.19570 -0.18398 -0.18340 -0.18204 -0.17661
eV -5.3253 -5.0064 -4.9905 -4.9536 -4.8057
beta:
irrep 424a 425a 426a 427a 428a
eigenvalues H -0.20942 -0.20175 -0.19905 -0.19844 -0.18620
eV -5.6987 -5.4899 -5.4165 -5.3999 -5.0667
occupation 1.0000 1.0000 1.0000 1.0000 1.0000
irrep 429a 430a 431a 432a 433a
eigenvalues H -0.18499 -0.18310 -0.17785 -0.17710 -0.16507
eV -5.0339 -4.9824 -4.8395 -4.8192 -4.4918
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What does dscf/ridft report if you carry out a -proper run with
$pointval integrate?
And what isovalue did you use for the visualization?
Antti
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I used any value, no luck. Total density is plotted ok. I will check the keyword you recommended and get back
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well, it generates exactly the same size sd.cub file as previously which doesn't display any spin density at any isovalue
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OK, but what does the output say in the very ending? It should integrate the spin density over the whole box and report it.
Antti
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not sure what that means
integrated electron number(s):
-853.4042877 1.9766234
absolute values: -853.4042877 -2.0566246
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The number on the left is the total number of electrons (probably a bit off from the correct since the default pointval-grid is not accurate enough). The number on the right is the number of the unpaired electrons. So, there are about two unpaired electrons. But why you are not seeing the density? I have no idea...
Antti
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*panic mode*
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Panic? Did you also try negative isovalues for plotting the spin density (since you have more beta than alpha electrons=? There is one strange thing here, though: Why is the integrated electron number negative? For me it's always positive (at least for the systems I've tested). The integrated spin density (first row) is negative for my tests, if b > a. But for you the absolute value is negative? What Turbomole version are you using?
Antti
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6.3
I also noticed that in my SCF output electron number is -2
ENERGY CONVERGED !
ITERATION ENERGY 1e-ENERGY 2e-ENERGY NORM[dD(SAO)] TOL
3 -6124.1363485995 -78383.317633 38285.901959 0.000D+00 0.212D-10
Exc = -607.709306855 Coul = 38893.6112657
Ntotal = 854.00078377 Nspin =-2.0000048134
Na = 426.00038948 Nb = 428.00039429
current damping =19.800
Norm of current diis error: 0.10859E-01
max. resid. norm for Fia-block= 6.748D-04 for orbital 2a beta
max. resid. fock norm = 7.022D-02 for orbital 1432a beta
End of SCF iterations
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And what about plotting spin with negative isovalue? Still nothing?
Antti
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that did the trick. not sure why I would have -2 unpaired electrons or how that might have switched to negative, but it worked, thanks
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OK, I'm glad to hear it worked. The integrated numbers are indeed a bit funny, but everything else now makes sense since this a "spin_b > spin_a" case.
Antti