dear Leo, If you have calculated the conductance G(E) of a 2 terminal device, the current I at finite voltage V is given by I = Integral dE G(E) [ f(E-mu_L) - f(E-mu_R) ] where mu_L and mu_R are the chemical potential of the two electrodes, f(E) is the Fermi function. mu_L - mu_R = eV where V is the voltage drop across the devices. Beware that this equation assumes a NON INTERACTING system and can lead to physically wrong results. (It neglects the electrostatic which becomes almost always relevant at finite bias). Best regards, Xavier

Le 30 juin 2020 à 13:37, <loojoo026@gmail.com> <loojoo026@gmail.com> a écrit :

dear all I have done my project using Kwant and I have drawn a conductance-energy diagram for the system. The question I have is how can I get the current-voltage diagram? thanks Leo