Induced N=2 composite supersymmetry in 2+1 dimensions
  Starting from N=1 scalar supermultiplets in 2+1 dimensions, we build explicitly the composite superpartners which define a N=2 superalgebra induced by the initial N=1 supersymmetry. The occurrence of this extension is linked to the topologically conserved current out of which the composite superpartners are constructed. 
J. Alexandre, N.E. Mavromatos and Sarben Sarkar (King's Coll. London)