Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 25, Pages 5420-5423Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.5420
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The phase diagram of the organic superconductor kappa-(ET)(2)Cu[N(CN)(2)]Cl has been accurately measured from H-1 NMR and ac susceptibility techniques under helium gas pressure. The domains of stability Bf 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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