Ballistic spin currents in mesoscopic metal/In(Ga)As/metal junctions
  We investigate the ballistic spin transport through a two-dimensional mesoscopic metal/semiconductor/metal double junctions in the presence of spin-orbit interactions. It is shown that \emph{real} longitudinal and/or transverse spin currents can flow in the presence of the Rashba and Dresselhaus terms. 
Minchul Lee, Mahn-Soo Choi