We present a detailed study of the phase diagram of the antiferromagnetic Kondo-lattice compound CeIn3 under pressure up to 100 kbar by resistivity measurements. Antiferromagnetic order vanishes at a critical pressure Pc=26.5 kbar. At this quantum critical point a complete superconducting transition is found in the pressure range from 24 to 27 kbar. Normal state properties near the critical point show strong deviations from Fermi-liquid behavior. In magnetic fields just above the upper critical field Fermi-liquid behavior is restored. For P>Pc, ρ(T) shows a clean T2 dependence up to a crossover temperature TI which increases linearly with pressure. The temperature dependence of the upper critical field Hc2 can be described with a strong coupling model in the clean limit.
Physical Review B
- Pub Date:
- January 2002
- Strongly correlated electron systems;
- heavy fermions;
- Non-Fermi-liquid ground states electron phase diagrams and phase transitions in model systems;
- Heavy-fermion superconductors