Fermi surface properties in Sr2RuO4

Yoshiyuki Yoshida, Atsushi Mukai, Rikio Settai, Kousaku Miyake, Yoshihiko Inada, Yoshichika Onuki, Kiyoshi Betsuyaku, Hisatomo Harima, Tatsuma D. Matsuda, Yuji Aoki, Hideyuki Sato

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

We measured the de Haas-van Alphen (dHvA) effect, magnetoresistance and specific heat to clarify the two-dimensional Fermi surface properties of Sr2RuO4. From the angular dependence of the dHvA amplitude, we determined the Yamaji angle for three quasi-cylindrical Fermi surfaces α, β and γ to be 30.6° for the Fermi surface α, about 30° for β and 15.3° for γ. The cyclotron masses of sum and difference oscillatory components, m*β ± α and m*γ ± α, are found to be highly different from m*β + m*α and m*γ + m*α, respectively, for any field direction. The dHvA oscillation due to sums and differences is not due to the magnetic interaction but to the chemical potential oscillation for quasi-two-dimensional Fermi surfaces. The specific heat data are discussed from a viewpoint of a characteristic energy gap in a possible p-wave superconductor Sr2RuO4.

Original languageEnglish
Pages (from-to)3041-3053
Number of pages13
Journaljournal of the physical society of japan
Volume68
Issue number9
DOIs
Publication statusPublished - Sep 1999
Externally publishedYes

Keywords

  • Anisotropic superconductor
  • Chemical potential oscillation
  • Fermi surface
  • Magnetoresistance
  • Specific heat
  • SrRuO
  • Yamaji effect
  • dHvA effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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