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QuantumATK => General Questions and Answers => Topic started by: manhtien1502 on August 24, 2015, 08:13

Title: Single molecular field-effect transistor
Post by: manhtien1502 on August 24, 2015, 08:13

Hi everyone!
I try to draw the single molecular (DTB molecule) field-effect transistor but I don't know wheather it is correct with the definition of dielectric layer and gate.
Can you check for me?
Thank you!

Title: Re: Single molecular field-effect transistor
Post by: Jess Wellendorff on August 24, 2015, 09:55

You need the gate and the dielectric to be located inside the device supercell. Otherwise they cannot be part of the calculation. You might have a look at http://quantumwise.com/documents/tutorials/latest/InAsDevice/index.html/chap.nanowiredevice.html (http://quantumwise.com/documents/tutorials/latest/InAsDevice/index.html/chap.nanowiredevice.html) for inspiration.

Setting up metallic gate(s) and dielectric region(s) is a rather critical part of setting up the device configuration, because it determines what sort of nanoscale device you want to simulate: Should the gate/dielectric extend all the way from left to right electrode or not? What should the dielectric constant and gate potential be? etc.