檢視 Solvetimestep2D 的原始碼

$solvetimestep2D is a command for solving the transient behavior of the device. The format is 

 $solvetimestep2D
 number_of_different_steps(Nt)
 steptype contact_type <math>\delta t ~~   t_{total}</math> par1 par2 par3 par4 ....    
 steptype contact_type <math>\delta t ~~   t_{total}</math> par1 par2 par3 par4 ....    
 ...
 steptype contact_type <math>\delta t ~~   t_{total}</math> par1 par2 par3 par4 ....    repeat Nt times


The number of parameters depeding on step type. Now we have 3 step types <br>

 Steptype  = 1:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 </math><br>
  <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math><br>

 Steptype  = 2:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 ,~~ A_{0} ,~~ \omega,~~ c_{0} </math><br>
 <math> vg=vg_{0} +  A_{0} \times sin\left( 2\pi \omega t + c_0 \right) </math><br>

 Steptype  = 3:  <br>
 <math>\delta t, ~~t_{total},~~ vg_0 ,~~  A_{0} ,~~ \omega ,~~ c_{0}  </math><br>
 <math> vg=vg_{0} +  int(A_{0} \times sin\left( 2\pi \omega t + c_0 \right)) </math><br>

contact_type 
 2: gate
 3: source
 4: drain

 Steptype  = 4:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 </math><br>
 <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math> , generation = system generation at t<0 and generation =0 for t> 0 <br> 

 Steptype  = 5:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}</math><br>
 <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math> , generation = system generation at t<0 generation = gen(system)*<math> (0.5+0.5*cos (2\pi \omega t + c_{0})) </math> <br> 

 Steptype  = 6:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}</math><br>
 <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math> , generation = system generation at t<0 generation = gen(system)*<math> Int(0.5+0.5*cos (2\pi \omega t + c_{0})) </math> <br> 

 Steptype  = 7:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}</math><br>
 <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math> , generation = 0 at t<0 (Force Steady state to be 0), 
 generation = gen(system)*<math> (0.5+0.5*cos (2\pi \omega t + c_{0})) </math> <br> 

 Steptype  = 8:  <br>
 <math>\delta t,~~ t_{total},~~ vg_0 ,~~ \omega ,~~ c_{0}</math><br>
 <math>vg=vg_{end}</math> for t<0, for t>0, vg=<math> vg_0  </math> , generation = 0 at t<0 (Force Steady state to be 0),
 generation =gen(system)*<math> Int(0.5+0.5*cos (2\pi \omega t + c_{0})) </math> <br> 



For example: <br> 

 $solvetimestep2D
 2
 2 2 1.0e-10 1.0e-6 3.00 0.1 1.0e6 0.0 
 2 4 1.0e-10 1.0e-6 3.00 0.1 1.0e6 0.0 
  <math> vg=3.0 + 0.1 \times sin\left( 2\pi \times 10^{6} t  \right) </math><br>
  <math> vd=3.0 + 0.1 \times sin\left( 2\pi \times 10^{6} t  \right) </math><br>


related:<br>
$[[savetimestep2D]]