Abstract
The electronic structure and superconductivity of layered organic materials based on the bis(ethylenedithio)tetrathiafulvalene molecule (BEDT-TTF, hereafter ET) with essential intra-ET correlations of electrons are analysed. Taking into account the Fermi surface topology, the superconducting electronic density of states (DOS) is calculated for a realistic model of K-ET2X salts. A d-symmetry of the superconducting order parameter is obtained and a relation is found between its nodes on the Fermi surface and the superconducting phase characteristics. The results are in agreement with the measured non-activated temperature dependences of the superconducting specific heat and NMR relaxation rate of central 13C atoms in ET.
Original language | English |
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Pages (from-to) | 53-60 |
Number of pages | 8 |
Journal | Advanced Materials for Optics and Electronics |
Volume | 8 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1998 |
Externally published | Yes |
Keywords
- Dielectric-metal transition
- Electron correlations
- Fermi surface
- Organic conductors
- Superconductivity