Electron flow in split-gated bilayer graphene
  We present transport measurements on a bilayer graphene sheet with homogeneous back gate and split top gate. The electronic transport data indicates the capability to direct electron flow through graphene nanostructures purely defined by electrostatic gating. By comparing the transconductance data recorded for different top gate geometries - continuous barrier and split-gate - the observed transport features for the split-gate can be attributed to interference effects inside the narrow opening. 
S. Dr\"oscher, C. Barraud, K. Watanabe, T. Taniguchi, T. Ihn, K.   Ensslin
cond-mat.mes-hall