Aharonov-Bohm effect in bilayer graphene

We investigate Aharonov-Bohm effect in bilayer graphene. We consider a setup of n-p(n′)-n junction with Aharonov-Bohm loop connected in the transmission region. In the presence of trigonal warping we show that, due to the anisotropic dispersion of eigenspectrum, the Aharonov-Bohm interference depends on the geometry of junction: it exists for armchair interface but vanishes for zigzag interface. For the armchair interface, it is demonstrated that the period of Aharonov-Bohm oscillation is Φ0=h/e and the amplitude of oscillation can be varied with incident energy and the barrier height of the junction.