Yv. Sushko et al., REENTRANT SUPERCONDUCTIVITY IN KAPPA-(BEDT-TTF)2CU[N(CN)2]CL AND ITS PRESSURE PHASE-DIAGRAM, Solid state communications, 87(11), 1993, pp. 997-1000
Electrical resistivity and magnetization measurements reveal that kapp
a-(BEDTTTF)2Cu[N(CN)2]Cl exhibits reentrant superconductivity (reporte
d here for the first time for an organic solid) in a wide pressure reg
ion. The behavior based on the subtle balance between superconductivit
y and resistive (magnetic) phase is affected dramatically by thermal h
istory. The low temperature state below 300 bar is of inhomogeneous mi
xture of superconductive and non-metallic phases, while the phase in h
igher pressure region can be single: rich variety of phases are found
in pressure phase diagram.