LAUSR

Ballistic transport is considered in a channel consisting of two layers under the assumption that the negative refraction of particles moving along the channel occurs on the boundary of the layers; this is similar to the Veselago effect known in optics. This formulation of the model may be defined by electron transport in graphene and Weyl metals, where negative refraction is caused by the Klein effect on the p–n junction, as well as spin; for example, photon transport in metamaterials. It is shown that, in the semiclassical approximation, the property of the boundary with negative refraction is similar to backscattering; therefore, it can significantly affect transport through long and narrow channels, even in the case of a perfect border. However, if the border is not perfect (contains roughness, adsorbed impurities, etc.), and refraction (tunneling) and reflection processes occur randomly, then, a set of interesting features of the channel substantially expands and opens up possibilities for the effect...