Magnetization dynamics and Majorana fermions in ferromagnetic Josephson   junctions along the quantum spin Hall edge
  We investigate the interplay between ferromagnetic and superconducting order at the edge of a quantum spin Hall insulator. Using complementary analytical and self-consistent numerical approaches, we study a ferromagnetic Josephson junction and show how the direct coupling between magnetism and the superconducting U(1) phase gives rise to several unusual phenomena which distinguishes the present system from its non-topological equivalent. In particular, we demonstrate how the anomalous current-phase relation triggers supercurrent-induced magnetization dynamics and also study the spatial localization of the Majorana fermions appearing in the junction. 
Annica M. Black-Schaffer and Jacob Linder
cond-mat.supr-con cond-mat.mes-hall