Search for the quadrupolar instability in URu2Si2

K. Kuwahara, H. Amitsuka, K. Tenya, T. Sakakibara, O. Suzuki, S. Nakamura, T. Goto, M. Mihalik, A. A. Menovsky, A. De Visser, J. J.M. Franse

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8 Citations (Scopus)


We have performed the thermal expansion α(T) and elastic constant c(T) measurements of the heavy electron system URu2Si2, with special attention to the tetragonal symmetry of Γ3 (x2 - y2) and Γ4(xy). The experimental results of c66, 1/2(c11 - c12) and α(T) along [±110] do not confirm a sizable uniform distortion for these two types of symmetry through a puzzling phase transition at To = 17.5 K. On the other hand, the 1/2(c11 - c12) data, which are missing in the previous detailed study, are found to show a weak but significant tendency of softening below about 70 K, suggesting an elastic response of the quadrupolar moment of J2x - J2y.

Original languageEnglish
Pages (from-to)77-79
Number of pages3
JournalPhysica B: Condensed Matter
Publication statusPublished - 1997 Feb


  • Elastic constants
  • Quadrupolar instability
  • Thermal expansion
  • URuSi

ASJC Scopus subject areas

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


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