  We consider the interaction of a heavy quark-antiquark pair moving in N=4 SYM
plasma in the presence of non-vanishing chemical potentials. Of particular
importance is the maximal length beyond which the interaction is practically
turned off. We propose a simple phenomenological law that takes into account
the velocity dependence of this screening length beyond the leading order and
in addition its dependence on the R-charge. Our proposal is based on studies
using rotating D3-branes.
