Pressure-temperature phase diagram, inverse isotope effect, and superconductivity in excess of 13 K in κ-(BEDT-TTFCu[N(CN]Cl, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene
- 1 September 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (9), 4666-4669
- https://doi.org/10.1103/physrevb.44.4666
Abstract
The pressure-temperature phase diagram of the highest- organic superconductor, κ-(BEDT-TTFCu[N(CN]Cl is determined, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene. Semiconducting, insulating, metallic, and superconducting regimes are seen at pressures below 1 kbar. Superconductivity at 12.5 K and 0.3 kbar increases by 0.5–1.5 K upon deuteration of BEDT-TTF, in striking contrast to the normal isotope effect determined previously for κ-(BEDT-TTFCu[N(CN]Br.
Keywords
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