Possible observation of the quadrupolar Kondo effect in dilute quadrupolar system PrxLa1-xPb3 for x≤0.05

T. Kawae, K. Kinoshita, Y. Nakaie, N. Tateiwa, K. Takeda, H. S. Suzuki, T. Kitai

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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.

Original languageEnglish
Article number027210
JournalPhysical Review Letters
Volume96
Issue number2
DOIs
Publication statusPublished - Jan 20 2006

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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