Anisotropic charge transport in 1D and 2D BeN4 and MgN4 nanomaterials: A first-principles study

•Electronic transport in 2D Dirac material beryllonitrene (BeN4) is studied.•The material shows strongly anisotropic charge transport.•Current along armchair direction is orders of magnitude larger.•Current can be enhanced by replacing Be atoms with other metal atoms.•Current anisotropy is also obtained for BeN4 nanotubes.