2014/06/01 by Zsolt Gulácsi, Zsolt Gulacsi
Materials Science · Physics and Astronomy · #Condensed matter physics #Conducting polymers and applications #Coulomb #Electron #Ferromagnetism #Interaction energy #Kinetic energy #Materials science #Nuclear magnetic resonance #Organic and Molecular Conductors Research #Physics #Polymer #Quantum and electron transport phenomena #Quantum mechanics #Strong interaction #cond-mat.mes-hall #cond-mat.soft #cond-mat.str-el
paper · pdf · doi:10.1140/epjb/e2014-50294-x
published as Eur. Phys. Jour. B87, 143 (2014) · 22 pages, 3 figures
openalex publication_date 2014/06/01 · arxiv created 2014/06/24 · arxiv updated 2014/06/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
For a general class of conducting polymers with arbitrary large unit cell and different on-site Coulomb repulsion values on different type of sites, I demonstrate in exact terms the emergence possibility of an upper, interaction created "effective" flat band. This last appears as a consequence of a kinetic energy quench accompanied by a strong interaction energy decrease, and leads to a non-saturated ferromagnetic state. This ordered state clearly differs from the known flat-band ferromagnetism. This is because it emerges in a system without bare flat bands, requires inhomogeneous on-site Coulomb repulsions values, and possesses non-zero lower interaction limits at the emergence of the ordered phase.