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 › peer-review

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

Keywords

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

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.65.2753

Cite this

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title = "Huge Lattice Softening in CeRu2 without Structural Transition",

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.",

keywords = "Band structure, CeRu, Deformation potential coupling, Elastic modulus, Elastic 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 Yoshichika {\"O}nuki",

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T1 - Huge Lattice Softening in CeRu2 without Structural Transition

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

PY - 1996/1/1

Y1 - 1996/1/1

N2 - 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.

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.

KW - Band structure

KW - CeRu

KW - Deformation potential coupling

KW - Elastic modulus

KW - Elastic softening

KW - Ultrasonic measurement

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