SIGMA and E0

[hongbiao]

For the SIGMA test for O atom from the session (ISMEAR=0), I got this result:

sigma entropy total E (TE) E sigma-0 (E0) TE-E0 E without entropy
0.0 0.00000 -0.0061125 -0.0061125 0 -0.00611250
0.01 -0.01543 -0.02153882 -0.0138257 -0.00771 -0.00611258
0.1 -0.15426 -0.1603749 -0.08324374 -0.07713 -0.00611258
0.2 -0.30852 -0.31463722 -0.1603749 -0.15426 -0.00611258
0.3 -0.46279 -0.46889954 -0.23750606 -0.23139 -0.00611258

E0 is the exploration of E to SIGMA close to 0, but why E0 is not constant with the change of SIGMA? So I am not so clear about how can we understand E0 ?

[admin]

Handson sessions are highly recommended as place to start:
https://www.vasp.at/vasp-workshop/slides/handsonI.pdf