화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.285, 211-216, 1996
Kappa-BEDT-TTF Salts as Layered Correlated Electron-Systems
The kappa-ET(2)X compounds are classified as strongly correlated electron systems. The tight-binding approach for correlated electrons is presented. The anisotropic superconducting pairing interaction is constructed based on the symmetry of electronic transfer integral and superconducting characteristics are calculated. For superconducting and normal properties, a decisive role of internal degrees of freedom in ET-layers, particularly in the ET(2) dimers is shown. The nodes of superconducting order parameter are reasonable for description of low energy experiments : nonactivated temperature dependence of superconducting specific heat and NMR relaxation rate.