Transport properties of CeCu2(Si0.9Ge0.1)2 under hydrostatic pressure

We investigated the non-monotonous evolution of superconductivity with pressure (P) in a single crystal of CeCu2(Si0.9Ge0.1)2 (P=0: antiferromagnetic order at TN∼1.2K, superconductivity at Tc∼0.35K). Electrical resistivity measurements were performed at low temperatures T>=50mK under nearly hydrostatic pressure conditions (0<P<4.5GPa). The existence of two distinct superconducting domes is observed in the T-P phase diagram, one at 0<P<2.2GPa and the other at 2.2<P<4.5GPa. Surprisingly, our preliminary data suggest that the T-P phase diagram is more rich in structure than reported previously