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)%C2%A0 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