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

Yukihiro Shimizu; Osamu Sakai

doi:10.1143/JPSJ.65.2632

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

Yukihiro Shimizu, Osamu Sakai

ENG - Applied Physics

Research output: Contribution to journal › Article › peer-review

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/T_K⁰ (Δ: the CEF excitation energy, T_K⁰: 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 language	English
Pages (from-to)	2632-2639
Number of pages	8
Journal	journal of the physical society of japan
Volume	65
Issue number	8
DOIs	https://doi.org/10.1143/JPSJ.65.2632
Publication status	Published - 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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title = "Analysis for Softening of Elastic Constant and Specific Heat in CePd2Al3 - Quadrupole Response Induced by the Kondo Effect",

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.",

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AU - Sakai, Osamu

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Y1 - 1996

N2 - 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.

AB - 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.

KW - Crystalline electric field

KW - Impurity anderson model

KW - Kondo effect

KW - Numerical renormalization group

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KW - Specific heat

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