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Mott transition, antiferromagnetism, and unconventional superconductivity in layered organic superconductors

Abstract : The pressure vs temperature phase diagram of the layered organic superconducting family κ-(BEDT-TTF)2X is accurately determined by investigating the NMR and AC susceptibility properties of the anion substituted compound X=Cu[N(CN)2]Cl under helium gas pressure. A first order boundary between antiferromagnetism and superconductivity is established which is found to evolve into a first order metal–insulator transition line in the paramagnetic domain. This latter transition line is in turn ending in a critical point above which a mere crossover is retrieved. The whole phase diagram features a point-like region at which metallic, insulating, antiferromagnetic and unconventional superconducting phases all meet.
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https://hal.univ-angers.fr/hal-02545450
Contributeur : Cécile Meziere <>
Soumis le : vendredi 17 avril 2020 - 10:09:02
Dernière modification le : mercredi 16 septembre 2020 - 16:40:15

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S. Lefebvre, P. Wzietek, S. Brown, C. Bourbonnais, D. Jerome, et al.. Mott transition, antiferromagnetism, and unconventional superconductivity in layered organic superconductors. Physica B: Condensed Matter, Elsevier, 2002, 312-313, pp.578-583. ⟨10.1016/S0921-4526(01)01552-6⟩. ⟨hal-02545450⟩

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