Practical meaning of the 'CELL' object?

[MolFET93]

Hi QATK community!

I have a trivial question: what is in practical terms the meaning of the cell (continuous white lines in the attachment) ? Is related to the basic unitary cell (crystallography) or more in general it represents the simulation domain where the calculator performs its analysis?

I mean: if I have to simulate for e.g. a FET I have to include in the cell all the objects that influence the transport (like in the attachment: gate and electrodes) or I can for example leave out the gate terminal? And what changes in the two different cases from a computational time standpoint and in the resulted IV curve?

Thank you for your kind attention

[mlee]

The below link shows the device configuration and pn junction. In the device calculation, you can implement the simulation domain in the central region.

https://docs.quantumatk.com/tutorials/atk_transport_calculations/atk_transport_calculations.html
https://docs.quantumatk.com/tutorials/inas_p-i-n_junction/inas_p-i-n_junction.html