spin orbit & LDA+U for f-electrons

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windiks
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spin orbit & LDA+U for f-electrons

#1 Post by windiks » Mon Jul 04, 2005 8:30 pm

Dear all,

I have problems to calculate spin orbit coupling with both the Dudarev and Liechtenste LSDA+U approaches for systems with f-electrons.
For example: Let's assume there two Ce3+ ion in the unit cell, which both have the electron configuration [Xe] 4f1.
When I apply both LSDA+U as well as the LDA+U approaches implemented in VASP 4.6 with a proper Hubbard U, the obtained atomic partial magnetic moments of the Ce3+ ions are around 1.0.
However, when I switch on the spin orbit coupling (LSORBIT = .TRUE.) the calculated sclar norms of the atomic partial magnetic moments are only 0.2

Provided VASP 4.6 has the capability to calculate spin orbit interactions for f-elements using DFT methods extended with Hubbard U: Which are the critical parameters one has to play with?

Thank you for your help.

Sincerely,
René Windiks
Last edited by windiks on Mon Jul 04, 2005 8:30 pm, edited 1 time in total.

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