Dear Wien2k users, I have some question about LDA+U parameters, U and J. 1- What is the unity used in the code, is it Ry or eV ? 2- Are this values unversal for any element, for example for the values of U and J Cu in CuO and YbaCu ? I found it the litterature equal to 6 eV. Merry Easter ! joyeuses pâques ! Souraya,