how to calculate the FET carrier mobility of WSe2

[njuxyh]

Hi all:
i have a FET system similar to figure 1. so i want to calculate the carrier mobility, i have seen a formular(see figure 2) in a eperiments in nano letter 2013 13 1983-1990.

but i am wondering how to define the channel width, because in our theortical work, the sheet of WSe2 is periodic in the x-y plane, so there is infinite wide,

therefore, dear ATK develper, would you help me to how to calculate the FET carrier mobility, because it is rather key parameters in device character.

[Jess Wellendorff]

Perhaps you can use the new Mobility analysis object available in ATK 2015:
http://docs.quantumwise.com/tutorials/mobility.html

[njuxyh]

sorry, the model shown in figure 2 is my real model, , because my model is a short channel with two Au(111) electode, 
 the electode contact  dominats the transport properties.
so i think it is not practical to use the mobility analysis tool in atk 2015,