dft optimization

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Arman Vigilant

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Feb 21, 2021, 6:36:19 PM2/21/21
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how i can use geometry optimization at periodic system??

start li
 title "li" 
charge +1
geometry units au  
 Li  17.8063    2.9677    0.0000   
 Li  19.2901    4.4516    1.4839   
 Li  20.7740    2.9677    0.0000   
 Li  22.2578    4.4516    1.4839   
 Li  23.7417    2.9677    0.0000   
 Li  25.2255    4.4516    1.4839   
 Li  17.8063    5.9354    0.0000   
 Li+  19.2901    7.4193    1.4839   
 Li  20.7740    5.9354    0.0000   
 Li  22.2578    7.4193    1.4839   
 Li  23.7417    5.9354    0.0000   
 Li  25.2255    7.4193    1.4839   
 Li  17.8063    8.9031    0.0000   
 Li  19.2901   10.3870    1.4839   
 Li  20.7740    8.9031    0.0000   
 Li  22.2578   10.3870    1.4839   
 Li  23.7417    8.9031    0.0000   
 Li  25.2255   10.3870    1.4839   

end 

dft
xc B3LYP
odft
mult 2
end

basis  
* library 6-311++g**  
  
end
task dft energy

Edoardo Aprà

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Feb 21, 2021, 6:41:33 PM2/21/21
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This same topic was discussed a few days ago https://groups.google.com/g/nwchem-forum/c/CYQeUO-zZv0/m/umdMU0dRBQAJ

The NWChem gaussian basis DFT code does not support periodic boundary conditions.

The only option in NWChem for periodic boundary condition is to use the plane-wave code https://nwchemgit.github.io/Plane-Wave-Density-Functional-Theory.html
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