How do i solve convergence problem in ATLAS simulation of Double channel GaN HEMT that arises by adding AlN layer to upper AlGaN barrier?

i am currently trying to reproduce a paper on Double channel GaN HEMT. The code doesn't converge for the upper barrier to be AlGaN(17nm) over AlN(1.5nm) while it works well for upper barrier to be...

22 July 2020 4,808 1 View