Research output: Contribution to journal › Conference article › peer-review
Metallic and semiconducting states of layered organic materials such as κ-ET2X salts are analyzed on the basis of bis(ethylenedithio)tetrathiafulvalene molecule (BEDT-TTF, hereafter ET) with essential intraET correlations of electrons. The insulator-metal phase transition of the Mott-Hubbard kind is derived in agreement with available experimental data. Taking into account the Fermi-surface topology the d-wave symmetry of superconducting order parameter is concluded and superconducting phase characteristics are calculated. The obtained value of 2ΔO/Tc exceeds the BCS one. The results are in agreement with measured nonactivated temperature dependencies of superconducting specific heat and NMR-relaxation rate of central carbons 13C in ET.
Original language | English |
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Pages (from-to) | 170-175 |
Number of pages | 6 |
Journal | Physica B: Condensed Matter |
Volume | 265 |
Issue number | 1-4 |
DOIs | |
State | Published - 2 Apr 1999 |
ID: 51232720