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 language | English |
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Pages (from-to) | 3041-3053 |
Number of pages | 13 |
Journal | journal of the physical society of japan |
Volume | 68 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sep 1999 |
Externally published | Yes |
Keywords
- Anisotropic superconductor
- Chemical potential oscillation
- Fermi surface
- Magnetoresistance
- Specific heat
- SrRuO
- Yamaji effect
- dHvA effect
ASJC Scopus subject areas
- Physics and Astronomy(all)