Influence of Disorder on Electron-Hole Pair Condensation in Graphene   Bilayers
  Graphene bilayers can condense into a state with spontaneous interlayer phase coherence that supports dissipationless counterflow supercurrents. Here we address the influence of disorder on the graphene bilayer mean-field and Kosterlitz-Thouless critical temperatures and report on a simple criteria for the survival of pair condensation. 
R. Bistritzer and A.H. MacDonald