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

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Electronic structure, insulator-metal transition and superconductivity in K-ET2X salts.pdf (167.18 KB)

Date

1998

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Ivanov V.A.
Ugolkova, E.A.
Zhuravlev, M.Ye.
Hakioǧlu, T.

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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. © 1998 John Wiley & Sons, Ltd.

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Advanced Materials for Optics and Electronics

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Dielectric-metal transition, Electron correlations, Fermi surface, Organic conductors, Superconductivity, Correlation methods, Electronic density of states, Electronic structure, Fermi level, Mathematical models, Nuclear magnetic resonance spectroscopy, Phase transitions, Relaxation processes, Salts, Specific heat, Superconductivity, Temperature measurement, Dielectric metal transitions, Organic conductors

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http://hdl.handle.net/11693/25486

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Scholarly Publications - Physics

Language

English

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Article