Fractional Occupation of Simple Molecules

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Tanvir ur Rahman Chowdhury

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Aug 16, 2021, 4:04:37 PM8/16/21
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Hello,
There are a couple of examples on the NWChem site about the calculations with fractional occupation numbers of simple atoms like Carbon. For instance, adding the line "fon partial 3 electrons 1.8 filled 2" in the dft module. How can I extend it to simple molecules like C2?
In other words, how can I do a fractional occupation calculation for molecules?
I would really appreciate it if you provide a simple example.
Thanks in advance.

Niri Govind

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Aug 17, 2021, 10:25:44 PM8/17/21
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Hi Tanvir,

I have just replied to your other email on the occup block. You can specify fractional occupations with the occup block. It's also easier to use compared with the fon.

Best,
-Niri

Niri Govind
PNNL


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