Research output: Contribution to journal › Conference article › peer-review
Band structure, insulator-metal transition and superconducting characteristics of two-dimensional BEDT-TTF-based systems. / Ivanov, V. A.; Zhuravlev, M. Ye; Ugolkova, E. A.
In: Physica B: Condensed Matter, Vol. 265, No. 1-4, 02.04.1999, p. 170-175.Research output: Contribution to journal › Conference article › peer-review
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TY - JOUR
T1 - Band structure, insulator-metal transition and superconducting characteristics of two-dimensional BEDT-TTF-based systems
AU - Ivanov, V. A.
AU - Zhuravlev, M. Ye
AU - Ugolkova, E. A.
PY - 1999/4/2
Y1 - 1999/4/2
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0033515299&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(98)01363-5
DO - 10.1016/S0921-4526(98)01363-5
M3 - Conference article
AN - SCOPUS:0033515299
VL - 265
SP - 170
EP - 175
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
ER -
ID: 51232720