1993/09/20 by Steven C. Erwin, S.C. Erwin, Christoph Bruder +1 · 30 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Materials and Semiconductor Technologies #Advanced Physical and Chemical Molecular Interactions #Electron #Electronic correlation #Fullerene Chemistry and Applications #Ground state #Kinetic energy #State (computer science) #cond-mat
paper · pdf · open access · doi:10.1016/0921-4526(94)91917-8
published in Physica B Condensed Matter 199-200, 600-603 (Elsevier BV) · 9 pages + 3 figures, REVTeX 3.0
arxiv created 1993/09/20 · openalex publication_date 1994/04/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Band theory predicts both K3C60 and K4C60 to be metals; various experimental probes show that while K3C60 is indeed metallic, K4C60 appears to be insulating. The standard view of this apparent failure of the single-particle picture is that electron correlation is predominant. We describe an alternative scenario, motivated on theoretical grounds, which invokes a spin- or charge-density-wave state to explain the observed insulating behavior.