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

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20 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)2753-2756
Number of pages4
Journaljournal of the physical society of japan
Issue number9
Publication statusPublished - Jan 1 1996
Externally publishedYes


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

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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