Dynamics of singlet-triplet crystalline electric field levels in Pr skutterudites

Junya Otsuki; Hiroaki Kusunose; Yoshio Kuramoto

doi:10.1016/j.physb.2006.01.092

Dynamics of singlet-triplet crystalline electric field levels in Pr skutterudites

Junya Otsuki, Hiroaki Kusunose, Yoshio Kuramoto

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

Abstract

Dynamics of 4f² electrons with the singlet-triplet crystalline electric field (CEF) levels in Pr skutterudites is studied by taking account of hybridization with conduction electrons. Dynamical properties are numerically derived with use of the non-crossing approximation (NCA). The effective exchange interaction depends much on the nature of the CEF triplet wave functions. Although the CEF singlet is eventually formed at low temperatures, Kondo effect is seen at temperatures higher than the CEF splitting. The crossover from the Kondo-like behavior to the CEF singlet-like one is explicitly shown in the electrical resistivity and magnetic intensity.

Original language	English
Pages (from-to)	244-245
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.092
Publication status	Published - May 1 2006
Externally published	Yes

Keywords

Crystalline electric field
Kondo effect
Non-crossing approximation
Skutterudite

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2006.01.092

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title = "Dynamics of singlet-triplet crystalline electric field levels in Pr skutterudites",

abstract = "Dynamics of 4f2 electrons with the singlet-triplet crystalline electric field (CEF) levels in Pr skutterudites is studied by taking account of hybridization with conduction electrons. Dynamical properties are numerically derived with use of the non-crossing approximation (NCA). The effective exchange interaction depends much on the nature of the CEF triplet wave functions. Although the CEF singlet is eventually formed at low temperatures, Kondo effect is seen at temperatures higher than the CEF splitting. The crossover from the Kondo-like behavior to the CEF singlet-like one is explicitly shown in the electrical resistivity and magnetic intensity.",

keywords = "Crystalline electric field, Kondo effect, Non-crossing approximation, Skutterudite",

author = "Junya Otsuki and Hiroaki Kusunose and Yoshio Kuramoto",

year = "2006",

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doi = "10.1016/j.physb.2006.01.092",

language = "English",

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T1 - Dynamics of singlet-triplet crystalline electric field levels in Pr skutterudites

AU - Otsuki, Junya

AU - Kusunose, Hiroaki

AU - Kuramoto, Yoshio

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Dynamics of 4f2 electrons with the singlet-triplet crystalline electric field (CEF) levels in Pr skutterudites is studied by taking account of hybridization with conduction electrons. Dynamical properties are numerically derived with use of the non-crossing approximation (NCA). The effective exchange interaction depends much on the nature of the CEF triplet wave functions. Although the CEF singlet is eventually formed at low temperatures, Kondo effect is seen at temperatures higher than the CEF splitting. The crossover from the Kondo-like behavior to the CEF singlet-like one is explicitly shown in the electrical resistivity and magnetic intensity.

AB - Dynamics of 4f2 electrons with the singlet-triplet crystalline electric field (CEF) levels in Pr skutterudites is studied by taking account of hybridization with conduction electrons. Dynamical properties are numerically derived with use of the non-crossing approximation (NCA). The effective exchange interaction depends much on the nature of the CEF triplet wave functions. Although the CEF singlet is eventually formed at low temperatures, Kondo effect is seen at temperatures higher than the CEF splitting. The crossover from the Kondo-like behavior to the CEF singlet-like one is explicitly shown in the electrical resistivity and magnetic intensity.

KW - Crystalline electric field

KW - Kondo effect

KW - Non-crossing approximation

KW - Skutterudite

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DO - 10.1016/j.physb.2006.01.092

M3 - Article

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SN - 0921-4526

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EP - 245

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - SPEC. ISS.

ER -

Dynamics of singlet-triplet crystalline electric field levels in Pr skutterudites

Abstract

Keywords

ASJC Scopus subject areas

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