title: Electron pairing in designer materials: a novel strategy for a negative effective Hubbard U.
abstract: We propose a set of design rules with a model Hamiltonian that allows electrons to form attracting pairs through the exploitation of a new combination of resonant band alignment and Coulombic repulsion. The pair bands and single particle bands in various lattices are calculated and compared in energy, and regions of net attraction are identified. This work provides guidelines for the construction of molecular systems, nanocrystals, and nanoparticle arrays with the potential for superconductivity.
authors.affiliation: Department of Chemistry and the Materials Research Center, Northwestern University , Evanston, Illinois 60208, United States.
authors.forename: Melanie R
authors.initials: MR
authors.lastname: Butler
authors.forename: Bijan
authors.initials: B
authors.lastname: Movaghar
authors.forename: Tobin J
authors.initials: TJ
authors.lastname: Marks
authors.forename: Mark A
authors.initials: MA
authors.lastname: Ratner
keywords: Electron correlation; Hubbard model; nanoparticle arrays; superconductivity; supramolecular lattices