About the time cost

[albatross]

I am simulating a field effect transistor using ATK 12.2. If I increase the gate dielectric thickness, will it take longer time to get convergence? If so, by how much will the time cost increases?

[kstokbro]

I will take longer but how much is very difficult to tell, it depends on many different details. I would expect it will take only slightly longer time, however, you simply need to try it.