The competition between the superconducting and the excitonic phases on   doped Dirac electronic systems
  We investigate the competition between the superconducting and the excitonic phases on Dirac electrons on a bipartite planar lattice. The conditions for the appearance of superconductivity or excitonic condensate are given by the minima of the free energy and our results are explained. 
Lizardo H. C. M. Nunes, R. L. S. Farias and E. C. Marino
cond-mat.str-el cond-mat.mes-hall cond-mat.supr-con hep-ph