Dear Hardshad, I might be missing some factors here, but the unit of current is elementary charge / unit of time. The unit of time is hbar / unit of energy that you used in defining your tight-binding model.

Best, Anton On Mon, Jan 23, 2017 at 3:49 PM, Harshad Sahasrabudhe <hsaha...@purdue.edu> wrote: > Hi, > > I was wondering what units would the wavefunction obtained from Kwant > have? I was thinking they would have the units 1/sqrt(nm.eV) (since my > energies are in eV and lengths are in nm) as the modes are normalized > according to > > [image: Inline image 1] > > How would I calculate the velocity of the mode, if the modes are > normalized to carry unit current? > > Thanks, > Harshad >