silvaco code:-
go atlas
mesh space.mult=0.01
#
x.mesh loc=0 spac=.005
x.mesh loc=.001 spac=.0005
x.mesh loc=.01 spac=.005
x.mesh loc=.03 spac=.005
x.mesh loc=.039 spac=.0005
x.mesh loc=.040 spac=.005
#
y.mesh loc=0 spac=.00005
y.mesh loc=.001 spac=.0005
y.mesh loc=.003 spac=.0005
y.mesh loc=.013 spac=.0005
y.mesh loc=.015 spac=.0005
y.mesh loc=.016 spac=.00005
# region
region num=1 material=air x.min=0 y.min=0
region num=2 material=silicon x.min=0.001 x.max=.01 y.min=.003 y.max=.013
region num=3 material=silicon x.min=.01 x.max=.03 y.min=.003 y.max=.013
region num=4 material=silicon x.min=.03 x.max=.039 y.min=.003 y.max=.013
region num=5 material=HfO2 x.min=0.01 x.max=.03 y.min=.001 y.max=.003
region num=6 material=HfO2 x.min=0.01 x.max=.03 y.min=.013 y.max=.015
#
qtx.mesh loc=0.002 spac=0.001
qtx.mesh loc=0.01 spac=0.0005
qtx.mesh loc=0.024 spac=0.0005
qtx.mesh loc=0.03 spac=0.0005
qtx.mesh loc=0.035 spac=0.001
qty.mesh loc=0.00 spac=0.0005
qty.mesh loc=0.0022 spac=0.0005
qty.mesh loc=0.003 spac=0.0005
qty.mesh loc=0.008 spac=0.0005
qty.mesh loc=0.012 spac=0.005
#electrode
electrode name=gate x.min=.01 x.max=.03 y.min=0 y.max=.001 mat=aluminium
electrode name=gate2 x.min=.01 x.max=.03 y.min=.015 y.max=.016 mat=aluminium
electrode name=drain x.min=0 x.max=0.001 y.min=0.003 y.max=0.013
electrode name=source x.min=.039 x.max=.04 y.min=0.003 y.max=0.013
#
MATERIAL MATERIAL=silicon me.tunnel=.44 mh.tunnel=.52 NC300=1e17 NV300=1e17
material material=hfo2 permittivity=22
#
doping uniform conc=1e20 reg=2
doping uniform conc=5e18 reg=4
#contact
contact name=gate workfun=4.5
contact name=gate2 workfun=4.5 common=gate
contact name=drain workfun=3.9
contact name=source workfun=5.93
save outf=tfet.str
tonyplot tfet.str
#model
models bbt.nonlocal bbt.forward bgn srh auger conmob fldmob cvt print
#
output val.band con.band qfn qfp e.field j.electron j.hole j.conduction j.total
#method
method newton autonr trap maxtrap=10
#solve
solve init
solve prev
solve vdrain=0.0
solve vdrain=0.01
solve vdrain=0.02
solve vdrain=0.03
solve vdrain=0.04
solve vdrain=0.05
log outf=tfet.log
solve name=gate vgate=0 vstep=0.05 vfinal=1.5
tonyplot tfet.log
quit
result:-
