An effective hopping model for weakly interacting π systems: Electronic structure of stacked polyaromatic hydrocarbons

Abstract

Parameters for effective hopping integrals are extracted from ab initio Hartree-Fock calculations on model systems. These effective hoppings can be used to describe the attractive part of the interaction of loosely bonded π-electron systems of various orientations, such as interchain hoppings in conjugated polymers or those between two-dimensional graphitic sheets.