[Pw_forum] multiples site Hubbard U

[Tommaso Francese]

Dear all, 
i?m working on a Yttria doped Zirconia, YSZ. I have understood how to calculate 
the U values for a single site, but how can i calculate the U values for both 
the transition metal inside the same structure, e.g. Zr and Y in YSZ structure? 
Do i have to build a supercell even in this case?
Thanks in advance,
Tommaso Francese.
Universit? C? Foscari of Venice.