  In spin-polarized itinerant electron systems, collective spin-wave modes
arise from dynamical exchange and correlation (xc) effects. We here consider
spin waves in doped paramagnetic graphene with adjustable Zeeman-type band
splitting. The spin waves are described using time-dependent
spin-density-functional response theory, treating dynamical xc effects within
the Slater and Singwi-Tosi-Land-Sjolander approximations. We obtain spin-wave
dispersions and spin stiffnesses as a function of doping and spin polarization,
and discuss prospects for their experimental observation.
