QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: njuxyh on April 6, 2016, 04:24

Title: is channel length can influence the gate effect?
Post by: njuxyh on April 6, 2016, 04:24

Hi all:

i have a question about the gate effect , my  metal layer thickness is increased to 13 angstrom, but when i add gate voltage to 13 V, the band gap was shift so small, so i am wondering whether the channel length 35 angstrom is too short? the channle length can influnece gate effect?

my two-probe system is attached, the Transmission spectrum at gate 0v and 13 v are also included,

is anyone can help to find the cause why the gate effect so small, my aim is to get a high off-on ration,

Title: Re: is channel length can influence the gate effect?
Post by: Jess Wellendorff on April 6, 2016, 10:26

I do not know what should happen to the band gap when applying such strong electric gate fields, but the real-space thickness of the metal gate should not matter too much, as long as it is not excessively thin.