Dear Yun-Peng,
Generally non-collinear calculation is hardest to converge, but I can't
figure it out without knowing your physical system nor without a
complete scf file.
But firstly, you should reduce your mixing factor instead of increase
it , start with mixing_beta = 0.1 and compare.
Youssef Aharbil,
Laboratory of Physics and Chemistry of Materials
Faculty of sciences Ben msik, Casablanca
Morocco
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