Acoustic de Haas-van Alphen effect and elastic anomaly of transverse mode (C11 - C12)/2 in Sr2RuO4

Hiroshi Matsui, Yoshiyuki Yoshida, Atsushi Mukai, Rikio Settai, Yoshichika Onuki, Humihiko Takei, Noriaki Kimura, Hayuyoshi Aoki, Naoki Toyota

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The acoustic de Haas-van Alphen (dHvA) effect and temperature dependence of the transverse mode (C11 - C12)/2 have been measured in a layered Perovskite superconductor Sr2RuO4 with Txc = 1.42K. From the acoustic dHvA oscillations for α and β orbits along [001], the area coefficients are estimated to be |ΛαB1g| = 0.8 and |ΛβB1g| = 0.2 ∼ 0.3. Both Fermi surfaces consisting of hybridized Ru-4dzx(yz) Orbitals couple weakly to εxx - εyy, because the in-plane shear strain hardly varies the spacing between the alternating RuO2 layers. Large softening occurs below 220K, which corresponds to the rotational instability. The rotational deformation of the RuO6 octahedron is induced perturbingly by εxx - εyy which reduces the lattice matching.

Original languageEnglish
Pages (from-to)3769-3772
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number12
DOIs
Publication statusPublished - 2000 Dec

Keywords

  • Acoustic de Haas-van Alphen effect
  • Ruthenate
  • Spin-triplet superconductor
  • SrRuO
  • Ultrasonic

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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