Mobility is the characteristic of the material and not the transistor. And it is determined by the scattering mechnisms. for ideal crystal it is infinite. Then the interaction with phonons comes setting the limit. And the scattering by impurities and so on.
Dear Doost, thank you very much for your guidance. I am reviewing your paper and try to use it for my own calculation. I will inform you if I could successful. Appreciated a lot.
Dear Nowzesh, that is brilliant, I wish you the best of luck, if you need any help whatsoever please do not hesitate for a even a moment to contact me.