1306.2233 (Pierre Carmier)

Ballistic magneto-interferences in graphene superconducting hybrid
junctions    [PDF]

Pierre Carmier

We investigate the influence of the superconducting (S) proximity effect in the quantum Hall (QH) regime by computing the charge conductance flowing through a graphene-based QH/S/QH junction. This situation offers the exciting possibility of studying the effect of tunneling processes through the S region on chiral edge state transport. We predict the appearance of conductance peaks at integer values of the Landau level filling factor, as a consequence of the quantum interferences taking place at the junction, and provide a semiclassical analysis allowing for a natural interpretation of these interferences in terms of electron and hole trajectories propagating along the QH/S interfaces. Our predictions should be observable in phase-coherent ballistic samples.

View original: http://arxiv.org/abs/1306.2233