Gate-Induced Band Ferromagnetism in an Organic Polymer

2001/08/27 by Ryotaro Arita, Yuji Suwa, Kazuhiko Kuroki +1 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Magnetism in coordination complexes #Organic Light-Emitting Diodes Research #Organic and Molecular Conductors Research #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.88.127202

4 pages, 7 figures

arxiv created 2001/08/27 · openalex publication_date 2002/03/07 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose that a chain of five-membered rings (polyaminotriazole) should be ferromagnetic with an appropriate doping that is envisaged to be feasible with a field-effect transistor structure. The ferromagnetism is confirmed by a spin density functional calculation, which also shows that ferromagnetism survives the Peierls instability. We explain the magnetism in terms of the Mielke and Tasaki flatband ferromagnetism with the Hubbard model. This opens a new possibility of band ferromagnetism in purely organic polymers.

Citations

• Organic Molecular Soft Ferromagnetism in a Fullerene C 60
• Soft self-consistent pseudopotentials in a generalized eigenvalue formalism
• Generalized gradient approximation for the exchange-correlation hole of a many-electron system
• Electron correlations in narrow energy bands

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