title: Route to ferromagnetism in organic polymers.
abstract: Employing a rigorous theoretical method for the construction of exact many-electron ground states we prove that interactions can be employed to tune a bare dispersive band structure such that it develops a flat band. Thereby, we show that pentagon-chain polymers with electron densities above half filling may be designed to become ferromagnetic or half metallic.
authors.affiliation: Theoretical Physics III, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, Augsburg, Germany.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Gulácsi
authors.forename: Arno
authors.initials: A
authors.lastname: Kampf
authors.forename: Dieter
authors.initials: D
authors.lastname: Vollhardt