Jan. 24, 2016
11:59 p.m.
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