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We show that a domain wall separating single layer graphene (SLG) andAA-stacked bilayer graphene (AA-BLG) can be used to generate highly collimatedelectron beams which can be steered by a magnetic field. Such system exists intwo distinct configurations, namely, locally delaminated AA-BLG and terminatedAA-BLG whose terminal edge-type can be either zigzag or armchair. Weinvestigate the electron scattering using semi-classical dynamics and verifythe results independently with wave-packed dynamics simulations. We find thatthe proposed system supports two distinct types of collimated beams thatcorrespond to the lower and upper cones in AA-BLG. Our computational resultsalso reveal that collimation is robust against the number of layers connectedto AA-BLG and terminal edges.

Electron collimation at van der Waals domain walls in bilayer graphene