Huge Lattice Softening in CeRu2 without Structural Transition

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

doi:10.1143/JPSJ.65.2753

Huge Lattice Softening in CeRu₂ without Structural Transition

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

Research output: Contribution to journal › Article

20 Citations (Scopus)

Abstract

Symmetrized elastic moduli of high-quality single-crystalline CeRu₂ have been measured between 2 and 300 K by means of an ultrasonic technique. Both transverse moduli (C₁₁ -C₁₂)/2 and C₄₄ soften markedly from 300 to ∼20 K without structural transition. In contrast, the bulk modulus C_B shows a normal temperature dependence without softening. These results indicate that there exists a marked structural fluctuation corresponding to a pure transverse strain in the normal conducting state of CeRu₂. Our analysis, taking account of the deformation potential coupling, reveals that a narrow band with relatively high density of states at E_F is responsible for the huge lattice softening.

Original language	English
Pages (from-to)	2753-2756
Number of pages	4
Journal	journal of the physical society of japan
Volume	65
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.65.2753
Publication status	Published - Jan 1 1996
Externally published	Yes

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Keywords

Band structure
CeRu
Deformation potential coupling
Elastic modulus
Elastic softening
Ultrasonic measurement

ASJC Scopus subject areas

Physics and Astronomy(all)

Cite this

Suzuki, T., Goshima, H., Sakita, S., Fujita, T., Hedo, M., Inada, Y., Yamamoto, E., Haga, Y., & Önuki, Y. (1996). Huge Lattice Softening in CeRu₂ without Structural Transition. journal of the physical society of japan, 65(9), 2753-2756. https://doi.org/10.1143/JPSJ.65.2753

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abstract = "Symmetrized elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by means of an ultrasonic technique. Both transverse moduli (C11 -C12)/2 and C44 soften markedly from 300 to ∼20 K without structural transition. In contrast, the bulk modulus CB shows a normal temperature dependence without softening. These results indicate that there exists a marked structural fluctuation corresponding to a pure transverse strain in the normal conducting state of CeRu2. Our analysis, taking account of the deformation potential coupling, reveals that a narrow band with relatively high density of states at EF is responsible for the huge lattice softening.",

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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 - Önuki, Yoshichika

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AB - Symmetrized elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by means of an ultrasonic technique. Both transverse moduli (C11 -C12)/2 and C44 soften markedly from 300 to ∼20 K without structural transition. In contrast, the bulk modulus CB shows a normal temperature dependence without softening. These results indicate that there exists a marked structural fluctuation corresponding to a pure transverse strain in the normal conducting state of CeRu2. Our analysis, taking account of the deformation potential coupling, reveals that a narrow band with relatively high density of states at EF is responsible for the huge lattice softening.

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10.1143/JPSJ.65.2753