Dear Joe, 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. Regards, Dedi
Date: Tue, 29 Sep 2015 13:57:18 +0200 From: joseph.weston@cea.fr To: setiabudidaya@hotmail.com CC: kwant-discuss@kwant-project.org 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