set ylabel "I [mA]"
set xlabel "V [mV]"
set xrange [1:800]
set logscale y 10
f(x) = 2.76116e-06*exp(0.02071*x)
g(x) = 0.000130417*exp(0.03310*x)
plot f(x) title "Si", g(x) title "Ge"