You perform an experiment at room temperature with a material and as you decrease the channel length down to 20nm you see an increase in the device conductance. You perform this experiment at 4K and you see that at roughly 40nm there is a significant change in the behavior of the device, its conductance does not change with channel length anymore. What has transpired?
I'm looking for some guidance on where to start this question. I believe it has to do with electron mean free paths but was not positive. Any assistance is appreciated!
For anyone curious, this was focused on the concept of Ballistic Conduction, and how with increased channel length we go from ballistic to classical conduction.
Dear Ahmed,
perhaps you realized a point contact. In this case only the dimension determines the conductance of the channel. The conductance is determined by quantum mechanics and not by electron-phonon interaction as it is usual for volume material. I apply a publication.
With Regard
R. Mitdank
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