Higher-Tc Superconducting Phase in Sr2RuO4 Induced by In-Plane Uniaxial Pressure

Abstract

We revealed that the superconducting transition temperature Tc of the multi-component superconductor Sr2RuO4 is enhanced to 3.3 K under in-plane uniaxial pressure that reduces the tetragonal crystal symmetry. This result suggests that new superconducting phases with a one-component order parameter are induced. We have also clarified the inplane pressure direction dependence of the emergence of this higher-Tc superconducting phase: pressure along the [100] direction is more favorable than pressure along the [110] direction. This result is probably closely related to the direct shortening of the in-plane Ru-O bond length along the pressure direction and the approach of the gamma Fermi surface to the van Hove singularity under the pressure parallel to the [100] direction.

Published in J. Phys. Soc. Jpn

References in corpus (6)

• High Resolution Polar Kerr Effect Measurements of Sr2RuO4: Evidence for Broken Time Reversal Symmetry in the Superconducting State
• First-Order Superconducting Transition of Sr2RuO4
• Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure
• Specific-heat evidence of the first-order superconducting transition in Sr2RuO4
• Large Enhancement of 3-K Phase Superconductivity in the Sr2RuO4-Ru Eutectic System by Uniaxial Pressure
• Spatial development of superconductivity in the Sr2RuO4-Ru eutectic system

Cited by in corpus (9)

• The Superconductivity of Sr${}_2$RuO${}_4$ Under $c$-Axis Uniaxial Stress
• Anisotropic spin fluctuations in Sr${}_2$RuO${}_4$: role of spin-orbit coupling and induced strain
• Spontaneous superconducting diode effect in non-magnetic Nb/Ru/Sr${}_2$RuO${}_4$ topological junctions
• Constraints on the superconducting state of Sr${}_2$RuO${}_4$ from elastocaloric measurements
• Heat-capacity measurements under uniaxial pressure using a piezo-driven device
• Negatively enhanced thermopower near a Van Hove singularity in electron-doped Sr${}_2$RuO${}_4$
• Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry
• Evolution of electronic and magnetic properties of Sr${}_2$IrO${}_4$ under strain
• Vestigial Van Hove singularity and higher-temperature superconducting phase induced by perpendicular uniaxial pressures in quasi-two-dimensional superconductors