Analysis for Softening of Elastic Constant and Specific Heat in CePd2Al3 - Quadrupole Response Induced by the Kondo Effect

Yukihiro Shimizu, Osamu Sakai

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11 Citations (Scopus)

Abstract

We analyze the temperature dependence of the specific heat and the quadrupole susceptibility for CePd2Al3, in which the Kondo effect coexists with the crystalline electric field (CEF) excitation. The calculation is carried out systematically by using the numerical renormalization group method. The ratio Δ/TK0 (Δ: the CEF excitation energy, TK0: the Kondo temperature for the fictitious system of Δ = 0) is estimated to be about 1.2 from the data of magnetic specific heat. The observed softening of C33 mode at very low temperature, which is expected to vanish in hexagonal compound such as CePd2Al3 from the conventional CEF theory, is explained by considering the Kondo effect.

Original languageEnglish
Pages (from-to)2632-2639
Number of pages8
Journaljournal of the physical society of japan
Volume65
Issue number8
DOIs
Publication statusPublished - 1996

Keywords

  • Crystalline electric field
  • Impurity anderson model
  • Kondo effect
  • Numerical renormalization group
  • Quadrupole response
  • Specific heat

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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