  We demonstrate in this work the transferability of self-energy(SE)
correction(SEC) of Kohn-Sham(KS) single particle states from smaller to larger
systems, when mapped through localized orbitals constructed from the KS states.
The approach results in a SE corrected TB framework, within which, the mapping
of SEC of TB parameters is found to be transferable from smaller to larger
systems of similar morphology, leading to a computationally inexpensive
approach for estimation of SEC in large systems with reasonably high accuracy.
The scheme has been demonstrated in insulating, semiconducting and magnetic
nanoribbons of graphene and hexagonal boron nitride, where SEC tends to
strengthen the individual pi bonds, leading to transfer of charge from edge to
bulk. Additionally in magnetic bipartite systems SEC tends to enhance
inter-sublattice spin separation. The proposed scheme thus promises to enable
estimation of SEC of band-gaps of large systems without needing to explicitly
calculate SEC of KS single particle levels which can be computationally
prohibitively expensive.
