Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure

Abstract

We have investigated uniaxial pressure effect on superconductivity of pure Sr2RuO4, whose intrinsic superconducting transition temperature Tc is 1.5 K. It was revealed that a very low uniaxial pressure along the c axis, only 0.2 GPa, induces superconductivity with the onset Tc above 3 K. The present results indicate that pure Sr2RuO4 has two superconducting phases with Tc = 1.5 K and with varying Tc up to 3.2 K. The latter phase exhibits unusual features and is attributable to anisotropic crystal distortions beyond the elastic limit.

arXiv comment4 pages, 4 figures, accepted for publication in Phys. Rev. B (Rapid Communication)

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• High sensitivity heat capacity measurements on Sr2RuO4 under uniaxial pressure
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• Little-Parks oscillations with half-quantum fluxoid features in Sr2RuO4 micro rings
• The Superconductivity of Sr${}_2$RuO${}_4$ Under $c$-Axis Uniaxial Stress
• Dislocations and the enhancement of superconductivity in odd-parity superconductor Sr${}_2$RuO${}_4$
• Manipulating superconductivity in ruthenates through Fermi surface engineering
• Higher-Tc Superconducting Phase in Sr2RuO4 Induced by In-Plane Uniaxial Pressure
• Anisotropic uniaxial pressure response of the Mott insulator Ca2RuO4
• Heat-capacity measurements under uniaxial pressure using a piezo-driven device
• Enhanced superconductivity at the interface of W/Sr${}_2$RuO${}_4$ point contact
• Thermal Hall conductivity and topological transition in a chiral p-wave superconductor for Sr2RuO4
• Inter-orbital p- and d-wave pairings between $d_{xz/yz}$ and $d_{xy}$ orbitals in Sr${}_2$RuO${}_4$
• Probing chiral superconductivity in Sr${}_2$RuO${}_4$ underneath the surface by point contact measurements
• Penetration of nonquantized magnetic flux through a domain-wall bend in time-reversal symmetry broken superconductors
• Tip-induced Superconductivity
• The interface between Sr${}_2$RuO${}_4$ and Ru-metal inclusion--Implications for its superconductivity
• Controllable enhancement of $p$-wave superconductivity via magnetic coupling to a conventional superconductor
• Thermal Hall conductivity in the spin-triplet superconductor with broken time-reversal symmetry
• Giant Enhancement of Superconductivity in Zr Point Contacts
• Emergence of the Chern structure using Sr${}_2$RuO${}_4$ nanofilms
• Suppression of superconductivity by charge density wave order in YBa${}_2$Cu${}_3$O${}_{6.67}$
• Vestigial Van Hove singularity and higher-temperature superconducting phase induced by perpendicular uniaxial pressures in quasi-two-dimensional superconductors
• Stability of Mixed-Symmetry Superconducting States with Broken Time-Reversal Symmetry against Lattice Distortions