How to induce a constant potential in a 2D layer practically

[hokhani]

The schematic figure, depicted below, shows a 2D layer (yellow) which is over an insulated layer shown by green (see (a)). A potential gate is below the insulator layer and I want to induce a constant potential in the part of the yellow layer located over the gate (See (b)). In other words, I want only to shift the band structure of the yellow 2D layer in that region without any charge transfer between the gate and the yellow layer. Does this structure fulfill this goal? If not, how can I do that?

 

[BigJDubs]

The structure as shown in the schematic diagram may not necessarily fulfill the goal of inducing a constant potential in the part of the yellow layer located over the gate. The reason is that the insulated layer (green) might not be thick enough to completely prevent charge transfer between the gate and the yellow layer.In order to achieve the desired goal, the insulated layer should be made thicker or replaced with a more effective insulator material. An additional layer of metal (as an electrode) can also be added beneath the insulated layer to help mitigate any charge transfer. Additionally, the gate should be adjusted to provide a more uniform electric field across the yellow layer.