Dear sir, Thank you for the suggestion. I will try it.
On Sat, Aug 8, 2020 at 11:46 PM <ousmane...@kaust.edu.sa> wrote: > Hi Naveen, > In fact, the Taylor expansion of the cos function up two second order > doesn't contain more than the first nearest neighbor hopping, so the result > doesn't correspond to the tight binding model you are comparing with. You > should expand the function up to forth order, then you will be able to see > second nearest neighbors from the kwant discretization. > > Regards, > Ousmane > -- Best Regards, Naveen Yadav Research Scholar Department of Physics & Astrophysics University Of Delhi New Delhi-110007
