1998/07/02 by Jörg Schmalian, Joerg Schmalian · 8 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Atomic orbital #Band gap #Condensed matter physics #Coulomb #Electron #Fermi level #Fermi surface #Magnetism in coordination complexes #Organic and Molecular Conductors Research #Organic superconductor #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.81.4232
4 pages, 3 figures
arxiv created 1998/07/02 · openalex publication_date 1998/11/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
I show that, for a \ensuremathκ-type organic (BEDT\ensuremath-TTF)2X molecular crystal, a superconducting state with Tc\ensuremath≈10K and gap nodes on the Fermi surface can be caused by short-ranged antiferromagnetic spin fluctuations. Using a two-band description for the antibonding orbitals on a BEDT-TTF dimer of the \ensuremathκ-type salt, and an intermediate local Coulomb repulsion between two holes on one dimer, the magnetic interaction and the superconducting gap function are determined self consistently within the fluctuation-exchange approximation. The pairing interaction is predominantly caused by interband coupling and additionally affected by spin excitations of the quasi-one-dimensional band.