How are the positive and negative gate voltages defined in QuantumATK

[dong0216]

Dear QuantumATK users,
     I want to ask you how to apply gate voltage to the devices in QuantumATK. For example, for a double gate device, is the applied gate voltage equal to the difference between the applied gate voltage to the upper gate minus the gate voltage to the lower gate？
    Thank you！

[Tue Gunst]

Hi,
The gate voltage in the just the actual value of the potential in the metallic regions applied.
In the double gate setup you apply the same value to both metallic regions. Having double gates in 2D or gate-all-around in 1D makes gating more effective.
An example of the double gate configuration can be found here:
https://docs.quantumatk.com/tutorials/inas_p-i-n_junction/inas_p-i-n_junction.html