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

doi:10.1143/JPSJ.69.3769

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

SCI - Physics

Research output: Contribution to journal › Article › peer-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 T^x_c = 1.42K. From the acoustic dHvA oscillations for α and β orbits along [001], the area coefficients are estimated to be |Λ^α_B1g| = 0.8 and |Λ_βB1g| = 0.2 ∼ 0.3. Both Fermi surfaces consisting of hybridized Ru-4d_zx(yz) Orbitals couple weakly to ε_xx - ε_yy, 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 ε_xx - ε_yy which reduces the lattice matching.

Original language	English
Pages (from-to)	3769-3772
Number of pages	4
Journal	journal of the physical society of japan
Volume	69
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.69.3769
Publication status	Published - 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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Acoustic de Haas-van Alphen effect and elastic anomaly of transverse mode (C₁₁ - C₁₂)/2 in Sr₂RuO₄. / Matsui, Hiroshi; Yoshida, Yoshiyuki; Mukai, Atsushi; Settai, Rikio; Onuki, Yoshichika; Takei, Humihiko; Kimura, Noriaki; Aoki, Hayuyoshi; Toyota, Naoki.

In: journal of the physical society of japan, Vol. 69, No. 12, 12.2000, p. 3769-3772.

Research output: Contribution to journal › Article › peer-review

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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.",

keywords = "Acoustic de Haas-van Alphen effect, Ruthenate, Spin-triplet superconductor, SrRuO, Ultrasonic",

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

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AU - Matsui, Hiroshi

AU - Yoshida, Yoshiyuki

AU - Mukai, Atsushi

AU - Settai, Rikio

AU - Onuki, Yoshichika

AU - Takei, Humihiko

AU - Kimura, Noriaki

AU - Aoki, Hayuyoshi

AU - Toyota, Naoki

PY - 2000/12

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N2 - 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.

AB - 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.

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