I have a few questions regarding simulation for Graphene PIN junction(see attached). Graphene is on the top of silicon PIN Junction. Bias from 0~8V is added to the metal to see some parameters(band structure, Electric field, charge). In simulation, I have some questions which I’m not sure.
In the Charge Solver, there is an option for Small Signal AC. What does it mean for the frequency option? How to set those values in the Small Signal AC option? How could the Small Signal AC setting affect the simulation results?
In simulation structure of the attached file, the minimum length is 1nm which is the height of graphene. In the Global Mesh Constraints in Charge solver, I set min edge length to be 0.5nm which is smaller than the minimum length in the structure. Does that make sense?
In DEVICE, if I open the Electric Field option in the Monitors, after I run simulation, the result is Electrostatics? When I tick the save data option and determine the file name, after I run the simulation, there isn’t matlab file(.mat) saved in my original folder, I don’t know why.