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

V. A. Ivanov; E. A. Ugolkova; M. Ye Zhuravlev; T. Hakioglu

doi:10.1002/(SICI)1099-0712(199803/04)8:2<53::AID-AMO328>3.0.CO;2-7

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

V. A. Ivanov^*, E. A. Ugolkova, M. Ye Zhuravlev, T. Hakioglu

^*Corresponding author for this work

Russian Academy of Sciences

Research output: Contribution to journal › Article › peer-review

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 analyzed. Taking into account the Fermi surface topology, the superconducting electronic density of states (DOS) is calculated for a realistic model of κ-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
Pages (from-to)	53-60
Number of pages	8
Journal	Advanced Materials for Optics and Electronics
Volume	8
Issue number	2
DOIs	https://doi.org/10.1002/(SICI)1099-0712(199803/04)8:2<53::AID-AMO328>3.0.CO;2-7
Publication status	Published - Mar 1998
Externally published	Yes

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10.1002/(SICI)1099-0712(199803/04)8:2<53::AID-AMO328>3.0.CO;2-7

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title = "Electronic structure, insulator-metal transition and superconductivity in κ-ET2X salts",

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 analyzed. Taking into account the Fermi surface topology, the superconducting electronic density of states (DOS) is calculated for a realistic model of κ-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.",

author = "Ivanov, {V. A.} and Ugolkova, {E. A.} and Zhuravlev, {M. Ye} and T. Hakioglu",

year = "1998",

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T1 - Electronic structure, insulator-metal transition and superconductivity in κ-ET2X salts

AU - Ivanov, V. A.

AU - Ugolkova, E. A.

AU - Zhuravlev, M. Ye

AU - Hakioglu, T.

PY - 1998/3

Y1 - 1998/3

N2 - 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 analyzed. Taking into account the Fermi surface topology, the superconducting electronic density of states (DOS) is calculated for a realistic model of κ-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.

AB - 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 analyzed. Taking into account the Fermi surface topology, the superconducting electronic density of states (DOS) is calculated for a realistic model of κ-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.

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DO - 10.1002/(SICI)1099-0712(199803/04)8:2<53::AID-AMO328>3.0.CO;2-7

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JO - Advanced Materials for Optics and Electronics

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ER -

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

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