Peculiarities of the Electronic Properties of the κ-Phase Structures (BEDT-TTF)_{2}Cu(N(CN)_{2})X with X=Cl, Br, I

• Authors: K. Andres , H. Posselt , N.D. Kushch , M. Kund , W. Biberacher , G. Saito
• Languages of publication: EN

Abstracts

EN

The structure of the title compounds is similar to other κ-phase struc­tures with respect to the checkerboard-like arrangement of the ET dimers (ET = BEDT-TTF) in the conducting planes, but different by the tilt al­ternation of these dimers in successive planes. The resulting inequivalence of these planes tends to destabilize the metallic state which becomes extremely sensitive to changes in the S-S overlaps of neighbouring ET molecules. Such changes may result from anion substitution, lattice expansion, or also from ordering effects of the ethylene end groups of the ET molecules. They lead to quite different electronic properties of the three isostructural compounds. We focus especially on the strongly pressure-dependent properties of the Cl-compound, where a coexistence of magnetically ordered and supercon­ducting states with rather spectacular superconducting reentrance effects is observed.

Keywords

EN

72.80.Le; 75.50.Gg; 75.50.Ee; 74.70.Kn

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 87
• Issue: 4-5
• Pages: 761-766

Dates

published

1995-04

Contributors

author

K. Andres

• Walther-Meissner-Institut for Low Temperature Research, D-85748 Garching, Germany

author

H. Posselt

• Walther-Meissner-Institut for Low Temperature Research, D-85748 Garching, Germany

author

N.D. Kushch

• Walther-Meissner-Institut for Low Temperature Research, D-85748 Garching, Germany

author

M. Kund

• Walther-Meissner-Institut for Low Temperature Research, D-85748 Garching, Germany

author

W. Biberacher

• Walther-Meissner-Institut for Low Temperature Research, D-85748 Garching, Germany

author

G. Saito

• Faculty of Chemistry, Kyoto University, Kyoto, Japan