Persistent spin oscillations in a spin-orbit-coupled superconductor
  Quasi-two-dimensional superconductors with tunable spin-orbit coupling are very interesting systems with properties that are also potentially useful for applications. In this manuscript we demonstrate that these systems exhibit undamped collective spin oscillations that can be excited by the application of a supercurrent. We propose to use these collective excitations to realize persistent spin oscillators operating in the frequency range of 10 GHz - 1 THz. 
Amit Agarwal, Marco Polini, Rosario Fazio, G. Vignale
cond-mat.mes-hall