Possible Observation of the Quadrupolar Kondo Effect in Dilute Quadrupolar System PrxLa1-xPb3 for x≤0.05
Abstract
We have studied non-Fermi-liquid (NFL) behavior in PrxLa1-xPb3 with Γ3 quadrupolar moments in the crystalline-electric-field ground state. The specific heat C/T shows NFL behavior in the very dilute region for x≤0.05, which is scaled by a characteristic temperature T* in each Pr concentration. The application of a magnetic field leads to a sharp increase of C/T, demonstrating the shift of the entropy existing in the lower temperature region at H=0T. Moreover, Fermi-liquid behavior emerges at higher fields, in contrast with NFL behavior at lower fields. The observed features indicate that NFL behavior is caused by the quadrupolar Kondo effect.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2006
- DOI:
- 10.1103/PhysRevLett.96.027210
- Bibcode:
- 2006PhRvL..96b7210K
- Keywords:
-
- 75.20.Hr;
- 71.27.+a;
- 75.40.Cx;
- Local moment in compounds and alloys;
- Kondo effect valence fluctuations heavy fermions;
- Strongly correlated electron systems;
- heavy fermions;
- Static properties