Work

Electron collimation at van der Waals domain walls in bilayer graphene

Year: 2019

Type: article

Abstract: We show that a domain wall separating single-layer graphene and AA-stacked bilayer graphene (AA-BLG) can be used to generate highly collimated electron beams which can be steered by a magnetic field. Two distinct configurations are studied, namely, locally delaminated AA-BLG and terminated AA-BLG whose terminal edge types are assumed to be either zigzag or armchair. We investigate the electron scattering using semiclassical dynamics and verify the results independently with wave-packet dynamics simulations. We find that the proposed system supports two distinct types of collimated beams that correspond to the lower and upper cones in AA-BLG. Our computational results also reveal that collimation is robust against the number of layers connected to AA-BLG and terminal edges.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.100.045137

Authors: H. M. Abdullah, D. R. da Costa, H. Bahlouli, A. Chaves, F. M. Peeters, B. Van Duppen

Institutions: King Fahd University of Petroleum and Minerals, University of Antwerp, Saudi Center for Theoretical Physics, Universidade Federal do Ceará

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze