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Long-Range Spin-Fluctuations and Superconductivity in Quasi-One-Dimensional Organic Compounds

1989; Physical Society of Japan; Volume: 58; Issue: 5 Linguagem: Inglês

10.1143/jpsj.58.1735

1347-4073

Hiroshi Shimahara,

Quantum and electron transport phenomena

The superconductivity mediated by antiferromagnetic spin-fluctuations (AFSF) is studied in the quasi-one-dimensional Hubbard model. The superconducting transition temperature and the momentum dependence of the order parameter are calculated numerically. An effect of the long-range (≫the lattice constant) AFSF is examined. The obtained phase diagram is compared with that of the organic superconductors (TMTSF) 2 X and (DMET) 2 X, and some qualitative agreements between the theory and experiments are obtained.