Magnetic excitations and phonon anomalies in URu2Si2

S. L. Cooper, M. V. Klein, M. B. Maple, M. S. Torikachvili

Research output: Contribution to journalArticlepeer-review


The results of a polarized light scattering study of URu2Si2 are presented and discussed for the temperature range 5T 350 K. Two of the Raman-active phonons allowed by the space- and site-group symmetries of URu2Si2 (D4h17-14mmm) are observed, displaying symmetries A1g and B1g. The A1g phonon demonstrates a large integrated intensity increase with decreasing temperature, suggesting a low-temperature increase in the strong electron-phonon coupling. Additionally, quasielastic scattering from spin fluctuations is noted, displaying the symmetry of the antisymmetric representation A2g. The spin-fluctuation linewidth is seen to decrease rapidly near TN, alluding to the formation of a gap over much of the Fermi surface.

Original languageEnglish (US)
Pages (from-to)5743-5746
Number of pages4
JournalPhysical Review B
Issue number10
StatePublished - 1987

ASJC Scopus subject areas

  • Condensed Matter Physics


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