Dear sir, I'm trying to get the transmission coefficients for up and down spin channels in graphene with Kane-Mele Hamiltonian (including Rashba term). So it needs to write the Hamiltonian for up and down spin separately.
I started with this, sys=kwant.Builder() lat_u=kwant.lattice.honeycomb() lat_d=kwant.lattice.honeycomb() a,b= lat_u.sublattices c,d= lat_d.sublattices My confusion is that, can I declare these sublattices for up and down spins. With Regards, Sudin
