  A combination of spin-orbit coupling and electron-electron interaction gives
rise to a new type of collective spin modes, which correspond to oscillations
of magnetization even in the absence of the external magnetic field. We review
recent progress in theoretical understanding and experimental observation of
such modes, focusing on three examples of real-life systems: a two-dimensional
electron gas with Rashba and/or Dresselhaus spin-orbit coupling, graphene with
proximity-induced spin-orbit coupling, and the Dirac state on the surface of a
three-dimensional topological insulator. This paper is dedicated to the 95th
birthday of Professor Emmanuel I. Rashba.

Strongly Correlated Electrons;Mesoscale and Nanoscale Physics