Thank you for your comments. You have greatly encouraged me to learn kwant more; I have never used spin before.
And by training, I am a paleomagnetist not a solid state physicist; so, multiplying the ldos just my wild idea.
> Date: Tue, 29 Sep 2015 13:57:18 +0200 > From: email@example.com > To: firstname.lastname@example.org > CC: email@example.com > Subject: Re: [Kwant] ldos.cumsum or ldos.cumprod > > Hi again, > > > I am trying to investigate a graphene using kwant and I would like to see if any defect in the material (e.g. using del sys [a(0,0)] ) could make the material becomes magnetic. Can this transformation be indicated by some changes in DOS ? I enclose the python codes. > > I took a quick look at your notebook, but as far as I can tell you just > put a spatially-varying potential on the sites of the ribbon. Given that > you don't include spin anywhere in your model, I cannot see how you > could ever have a magnetic effects which arise. > > Also I am not sure what you are trying to calculate. I do not know what > multiplying the density of states on each site together corresponds to > physically. > > I should probably say as well that we try to keep this mailing list > specifically about Kwant, rather than about general physics questions. > It seems that your question is more about general physics, than > specifically how to do a particular (and well defined) thing in Kwant. > I think that you may get more useful responses by posting on a specific > physics forum, for example https://physics.stackexchange.com/ > > Hope that helps, > > Joe