Giant lattice softening in the normal state of CeRu2

Takashi Suzuki; Hiroshi Goshima; Shigenobu Sakita; Toshizo Fujita; Masato Hedo; Yoshihiko Inada; Etsuji Yamamoto; Yoshinori Haga; Yoshitika Ônuki

doi:10.1016/S0921-4526(96)00582-0

Giant lattice softening in the normal state of CeRu₂

Takashi Suzuki, Hiroshi Goshima, Shigenobu Sakita, Toshizo Fujita, Masato Hedo, Yoshihiko Inada, Etsuji Yamamoto, Yoshinori Haga, Yoshitika Ônuki

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

1 Citation (Scopus)

Abstract

Elastic moduli of high-quality single-crystalline CeRu₂ have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C₁₁ - C₁₂)/2 and C₄₄ show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus C_B indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu₂. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.

Original language	English
Pages (from-to)	176-178
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	230-232
DOIs	https://doi.org/10.1016/S0921-4526(96)00582-0
Publication status	Published - Feb 1997
Externally published	Yes

Keywords

CeRu
Electronic band structure
Lattice softening
Ultrasonic measurement

ASJC Scopus subject areas

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

Access to Document

10.1016/S0921-4526(96)00582-0

Cite this

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title = "Giant lattice softening in the normal state of CeRu2",

abstract = "Elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C11 - C12)/2 and C44 show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus CB indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu2. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.",

keywords = "CeRu, Electronic band structure, Lattice softening, Ultrasonic measurement",

author = "Takashi Suzuki and Hiroshi Goshima and Shigenobu Sakita and Toshizo Fujita and Masato Hedo and Yoshihiko Inada and Etsuji Yamamoto and Yoshinori Haga and Yoshitika {\^O}nuki",

year = "1997",

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doi = "10.1016/S0921-4526(96)00582-0",

language = "English",

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journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Giant lattice softening in the normal state of CeRu2

AU - Suzuki, Takashi

AU - Goshima, Hiroshi

AU - Sakita, Shigenobu

AU - Fujita, Toshizo

AU - Hedo, Masato

AU - Inada, Yoshihiko

AU - Yamamoto, Etsuji

AU - Haga, Yoshinori

AU - Ônuki, Yoshitika

PY - 1997/2

Y1 - 1997/2

N2 - Elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C11 - C12)/2 and C44 show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus CB indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu2. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.

AB - Elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C11 - C12)/2 and C44 show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus CB indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu2. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.

KW - CeRu

KW - Electronic band structure

KW - Lattice softening

KW - Ultrasonic measurement

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