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Mott Transition, Antiferromagnetism, and Unconventional Superconductivity in Layered Organic Superconductors

Abstract : The phase diagram of the organic superconductor κ−(ET)2Cu[N(CN)2]Cl has been accurately measured from 1H NMR and ac susceptibility techniques under helium gas pressure. The domains of stability of antiferromagnetic and superconducting orders in the pressure vs temperature plane have been determined. Both phases overlap through a first-order boundary that separates two regions of inhomogeneous phase coexistence. The boundary curve merges with the first-order line of the metal-insulator transition which ends with a critical point at higher temperature. The whole phase diagram features a pointlike region where metallic, insulating, antiferromagnetic, and non-s-wave superconducting phases all meet.
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https://hal.univ-angers.fr/hal-02545900
Contributeur : Cécile Meziere <>
Soumis le : vendredi 17 avril 2020 - 14:59:10
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. Physical Review Letters, American Physical Society, 2000, 85 (25), pp.5420-5423. ⟨10.1103/PhysRevLett.85.5420⟩. ⟨hal-02545900⟩

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