hi Steffen,
there are two relevant parameters:
SPINFLIP which does it only for one segment, and GLOBALFLIP which does it for all of them
Does this correspond to a global move that flips all spins, i.e. for enforcing a paramagnetic solution or does it correspond to the part of the rotationally invariant Hund's coupling which is called Spin-Flip term?
We do not have rotationally invariant Hunds coupling in this, so it’s the first: it takes segments from one orbital and moves the to another one.
Best, Emanuel