Article Dans Une Revue Physica B+C Année : 1986

Two superconducting phases in the organic conductor: β-(BEDT-TTF)2I3

Résumé

We have investigated the nature and the stability of the high-Tc(∼8 K) and low-Tc (∼1.5 K)superconducting phases (respectively called β-H and β-L) of the organic conductor β-(BEDT-TTF)2I3, First, by resistivity measurements and following a well-defined temperature-pressure cycling process, we show that the β-H phase is stabilized at ambient pressure and low temperature, exhibiting a very sharp and complete superconducting transition at 8.1 K and 1 bar. Secondly, an AC-susceptibility study reveals that this state is stable and exhibits bulk superconductivity at high Tc and ambient P as long as the sample is not warmed above 125 K. Finally, we present NMR results on the 1H spin-lattice relaxation rate behaviour in both the β-H phase and the β-L phase.

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hal-04944381 , version 1 (22-03-2025)

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F. Creuzet, C. Bourbonnais, G. Creuzet, D. Jerome, D. Schweitzer, et al.. Two superconducting phases in the organic conductor: β-(BEDT-TTF)2I3. Physica B+C, 1986, 143 (1-3), pp.363-365. ⟨10.1016/0378-4363(86)90140-3⟩. ⟨hal-04944381⟩
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