Additional contributions to nonlinear transport in 2D van der Waals heterostructures studied within the Boltzmann approach

Recently, a lot of attention has been drawn to nonlinear electron transport in 2D van der Waals heterostructures from both experimental and theoretical perspectives. Experiments on different systems and with different sample geometries have revealed the presence of a giant nonlinear conductivity that cannot be accounted for by the known microscopic mechanisms of nonlinear transport. In this talk, we address some of the effects that were not previously considered in the context of second-order nonlinear conductivity in 2D van der Waals heterostructures. One example of such effects that we will discuss is weak localization and antilocalization. Both of these phenomena occur in systems with broken inversion symmetry, are especially pronounced in two dimensions, and can be treated, at least on a qualitative level, using the Boltzmann transport theory. We will also discuss the role of the substrate in electron scattering in these systems.