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Electronic structure, insulator–metal transition and superconductivity in κ-ET2X salts

✍ Scribed by V. A. Ivanov; E. A. Ugolkova; M. Ye. Zhuravlev; T. Hakioǧlu

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
167 KB
Volume
8
Category
Article
ISSN
1616-301X

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✦ Synopsis

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 k k k k-ET 2 X 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 13 C atoms in ET. *

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