[Kwant] a step tripping up Kwant

Hello everyone, I’ve been playing around with Kwant and come across some situations where the transmission between two leads is identically equal to zero when I wouldn’t expect that result. I’ve come up with a simple working example: a 1D step function with a step height that’s large relative

Re: [Kwant] a step tripping up Kwant

Hi Abbout, Is the upper bound on the energies in the leads documented somewhere? I guess it’s implicit in Sec. 2.4 of the tutorial, and now that you mention it, it makes sense given the periodic lattice. -Leon From: Abbout Adel mailto:abbout.a...@gmail.com>> Date: Monday, October 17, 2016 at 1

Re: [Kwant] a step tripping up Kwant

Hi Abbout, Thanks for the help. -Leon From: Abbout Adel mailto:abbout.a...@gmail.com>> Date: Monday, October 17, 2016 at 1:59 PM To: "Leon Maurer (lmaurer)" mailto:lmau...@sandia.gov>> Cc: "kwant-discuss@kwant-project.org" mailto:kwant-discuss@kwant-proje

Re: [Kwant] a step tripping up Kwant

Dear Leon, the value of the parameter 't' in your program is around 16. this means that the conduction band for the left lead is band_l=[0, 4 t ]=[0,64] and the conduction band for the right lead is band_r=[V0, V0+4 t]=[100, 164] as you can notice there is no energy which conducts in both leads.

Re: [Kwant] a step tripping up Kwant

Hi Leon, The upper and bottom limits of the conduction band are obtained from the relation of dispersion. E=V-2t *cos(k) (# in your case V=2t for left lead and V0 for the right lead ). For more details, you can look for example to : http://www-personal.umich.edu/~sunkai/teachi