Low-Density Ferromagnetism in Biased Bilayer Graphene
Low-Density Ferromagnetism in Biased Bilayer Graphene
We compute the phase diagram of a biased graphene bilayer. The existence of a ferromagnetic phase is discussed with respect to both carrier density and temperature. We find that the ferromagnetic transition is first-order, lowering the value of U relatively to the usual Stoner criterion. We show that in the …