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

physical review. b./physical review. b

Spin waves in doped graphene: a time-dependent spin-density-functional  approach to collective excitations in paramagnetic two-dimensional Dirac  fermion gases