$useschrodn

2D-DDCC solves the Poisson Drift-diffusion self-consistently. If we want to solve Schrodiner equations and get the eigen values, it would be very time consuming. Therefore, there is a special function to get the eigen wave functions and eigen levels in the cross section. Using $useschrodn can achieve this. When this command is used, the program will find top contact's type equal to 2, 21, 22, 7 to solve the problem. Actually this program is design for HEMT or MOSFET devices. The format is

$useschrodn
N_grid Y_top Y_depth Y_interface(Y_int) 

Although 2D solver is based on FEM, when the cross section solver is called, the program solve this problem using FD scheme. Therefore, we need to define Y_top and Y_depth as we used in 1D-DDCC Schrodinger solver to solve this problem. We also need to set N_grid to decide the dy in solver FD solver.