Unconventional Strain Dependence of Superconductivity in Spin-Triplet Superconductor Sr2RuO4

Noriki Okuda, Takashi Suzuki, Zhiqiang Mao, Yoshiteru Maeno, Toshizo Fujita

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Ultrasonic measurements have been performed on high quality single crystals of Sr2RuO4 across the superconducting transition temperature Tc (≈ 1.37 K). A discontinuous jump at Tc was observed in a longitudinal elastic modulus C11 as is seen in conventional superconductors, and the strain dependence of Tc was estimated from the jump by using the Ehrenfest relation. The uniaxial pressure dependence of Tc in Sr2RuO4 was found to be negative along the a axis and positive along the c axis, respectively. Thermodynamic analysis has cleanly shown that the superconductivity of Sr 2RuO4 is much affected by the deformation of RuO 2 planes. The strain effects on superconductivity are explained by large anisotropy of the lattice and electronic structure in Sr 2RuO4.

Original languageEnglish (US)
Pages (from-to)1134-1139
Number of pages6
JournalJournal of the Physical Society of Japan
Volume71
Issue number4
DOIs
StatePublished - Apr 1 2002

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superconductivity
pressure dependence
modulus of elasticity
ultrasonics
transition temperature
electronic structure
thermodynamics
anisotropy
single crystals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Okuda, Noriki ; Suzuki, Takashi ; Mao, Zhiqiang ; Maeno, Yoshiteru ; Fujita, Toshizo. / Unconventional Strain Dependence of Superconductivity in Spin-Triplet Superconductor Sr2RuO4. In: Journal of the Physical Society of Japan. 2002 ; Vol. 71, No. 4. pp. 1134-1139.
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Unconventional Strain Dependence of Superconductivity in Spin-Triplet Superconductor Sr2RuO4. / Okuda, Noriki; Suzuki, Takashi; Mao, Zhiqiang; Maeno, Yoshiteru; Fujita, Toshizo.

In: Journal of the Physical Society of Japan, Vol. 71, No. 4, 01.04.2002, p. 1134-1139.

Research output: Contribution to journalArticle

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AU - Fujita, Toshizo

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AB - Ultrasonic measurements have been performed on high quality single crystals of Sr2RuO4 across the superconducting transition temperature Tc (≈ 1.37 K). A discontinuous jump at Tc was observed in a longitudinal elastic modulus C11 as is seen in conventional superconductors, and the strain dependence of Tc was estimated from the jump by using the Ehrenfest relation. The uniaxial pressure dependence of Tc in Sr2RuO4 was found to be negative along the a axis and positive along the c axis, respectively. Thermodynamic analysis has cleanly shown that the superconductivity of Sr 2RuO4 is much affected by the deformation of RuO 2 planes. The strain effects on superconductivity are explained by large anisotropy of the lattice and electronic structure in Sr 2RuO4.

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