Ultrasonic studies of the spin-triplet order parameter and the collective mode in Sr2RuO4

H. Matsui, Y. Yoshida, A. Mukai, R. Settai, Y. Ōnuki, H. Takei, N. Kimura, H. Aoki, Naoki Toyota

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The elastic constant CT and ultrasonic attenuation αs for (C11-C12)/2 have been measured on Sr2RuO4 with Tc* = 1.42 K. In contrast to the A1g and Eg strains, the B1g strain (εxx - εyy) strongly couples to the superconducting state, which dominantly originate from hybridized Ru-4dxy electrons on the γ Fermi surface. Taken into account impurity induced in-gap states, the T3 dependence of αs is found to be consistent with an existence of line nodes. The large reduction in CT below Tc* evidences the two-component order parameter and chiral p-wave state. Anomalous CT and αs around Ta= 1.34 K suggest a collective mode.

Original languageEnglish
Article number060505
Pages (from-to)605051-605054
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number6
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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