Thanks! I also used the example simplest.py to simply add sites and hoppings.

Another question, how do I indicate that the one I added is a new atom? (i.e. change the color of the site)


Regards



On Monday, January 25, 2016 8:14 AM, Anton Akhmerov <anton.akhmerov+kd@gmail.com> wrote:


Hi James,

Yes, this is indeed possible. The first tutorial (
http://kwant-project.org/doc/1/tutorial/tutorial1)  demonstrates how
to add a single site or a single hopping.

Best regards,
Anton Akhmerov

On Mon, Jan 25, 2016 at 12:59 AM, james edward hernandez
<kibwiw@yahoo.com.ph> wrote:
> Hello,
>
> I used the tutorial 2.5 for the circular graphene sheet, and in the example,
> an atom is deleted at sublattice a at (0,0) via
>
> del sys [a(0,0)]
>
> How can I replace this 'vacancy' with a different atom (with a different
> hopping parameter, say, 2)?
>
> Also, from adding this new atom, do I adjust the hopping in sys using
>
> sys[a(-2,1),b(2,2)] = -2 ?
>
> Regards
>
> James