[CP2K-user] [CP2K:20934] Non-SCF Occupation Calculation for Linear Response DFT+U in cp2k

Romi_LUO luo.ronghao.phys at gmail.com
Fri Nov 29 04:14:59 UTC 2024



Dear CP2K Developers,

I am currently trying to calculate the Hubbard U parameter using the linear 
response approach in cp2k for a DFT+U setup. I have successfully obtained 
the occupations from the self-consistent response. However, I am struggling 
with how to obtain the non-self-consistent response occupations.

Specifically, I am trying to perform a calculation where only the electron 
density and occupations are updated without performing a full SCF 
iteration, in order to obtain the non-self-consistent occupations. I 
couldn't find a way to achieve this in cp2k. Could you please advise on how 
I can configure cp2k to only update the electronic density without running 
a complete SCF?

Any guidance or examples of input parameters to perform this type of 
non-SCF calculation would be immensely helpful.

Thank you very much for your assistance.

Here is some reference of linear response approach:
https://doi.org/10.1103/PhysRevB.71.035105
https://www.vasp.at/wiki/index.php/Calculate_U_for_LSDA%2BU

Best regards,
Luo Rong Hao  

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