Suppression of the Peierls instability in 1D system: Semi-local approach to Little’s conjecture

A bottom-up valence bond derivation of excitation energies in 1D-like delocalized systems

“…The first intention of this work is to show that chemicallyrelevant pictures can be used to grasp the physical properties of low-dimensional interacting electron systems. Our goal is to go beyond a recently proposed procedure for the ground state energies evaluation [30][31][32][33] and address in a costless way the important issue of charge gaps of extended systems.…”