Simulate Double gate mosfet in atlas

[sam.mosfet]

I made a double horizontal gate in devedit and I would like to simulate it using atlas. I know how to simulate a single gate mosfet but i wonder if there are some special command to put same gate voltage on both gates. Here is my code please advise. thank you.

go atlas

init inf= double_gate.str

output band.par con.band val.band 

# set material models
models cvt srh print 

contact name=gate n.poly
interface qf=3e10

method newton
solve init

# Bias the drain 
solve vdrain=0.1 

# Ramp the gate
log outf=double_gate.log master
solve vgate=0 vstep=0.25 vfinal=3.0 name=gate
save outf=double_gate_1.str

# plot results
tonyplot  double_gate.log -set double_gate_log.set


# extract device parameters
extract name="nvt" (xintercept(maxslope(curve(abs(v."gate"),abs(i."drain")))) \
	- abs(ave(v."drain"))/2.0)
extract name="nbeta" slope(maxslope(curve(abs(v."gate"),abs(i."drain")))) \
	* (1.0/abs(ave(v."drain")))
extract name="ntheta" ((max(abs(v."drain")) * $"nbeta")/max(abs(i."drain"))) \
	- (1.0 / (max(abs(v."gate")) - ($"nvt")))

quit