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Two-dimensional organic superconductors studied by NMR under pressure.

Abstract : The (BEDT)2X family of layered superconductors is one of the largest among nearly 50 org. superconductors currently known. One of the advantages of the org. compds. as prototype materials for studying the mechanisms of supercond. is their relatively high sensitivity to hydrostatic pressure. We review recent NMR studies of these compds. using NMR under liq. and gas pressure. We focus on the low temp. part of the phase diagram where the physics is controlled by electronic correlations leading to a competition between magnetism and supercond. This interplay between different ground states is shown by the observation of a pseudo-gap and antiferromagnetic fluctuations and can be finely tuned by the application of pressure. Using a gas pressure system gives the unique possibility of sweeping the pressure at low temp. Recently we used this technique to study the AF-SC boundary and established the existence of a first order transition line between the superconducting and antiferromagnetic states
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https://hal.univ-angers.fr/hal-02545592
Contributeur : Cécile Meziere <>
Soumis le : vendredi 17 avril 2020 - 11:28:52
Dernière modification le : mercredi 16 septembre 2020 - 16:40:15

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P. Wzietek, S. Lefebvre, H. Mayaffre, S. Brown, C. Bourbonnais, et al.. Two-dimensional organic superconductors studied by NMR under pressure.. Hyperfine Interactions, Springer Verlag, 2000, 128 (1/3), pp.183-191. ⟨10.1023/A:1012683632220⟩. ⟨hal-02545592⟩

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