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.

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

References in corpus (3)

• Anisotropic Dependence of Superconductivity on Uniaxial Pressure in CeIrIn5
• 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

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