Method for Determining the Spatial Distribution of Electrical Current Density in a Two-dimensional Material Device

摘要

The current density distribution is determined in an electronic device including a first and a second electrode, and a layer of a 2-dimensional conductive material extending between the first and second electrode. The total current through the electrodes is measured, and then a first current measurement probe is placed at a plurality of positions near the interface between the 2D material and the first electrode. The probe is coupled to the same voltage as the first electrode. The same is done at the interface between the channel and the second electrode, by placing a second probe coupled to the same voltage as the second electrode. The boundary conditions are determined for the current, and assuming that the current density vector is normal to the interfaces, this yields the boundary conditions for the current density vector. Finally, the continuity equation is solved, taking into account the boundary conditions.