Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure

Details Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure

2010-04-21

arxiv.org/abs/1004.3705v1

Phys. Rev. B 81, 180510(R) (2010)

Physics

Condensed Matter

Superconductivity

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

Scientific paper

10.1103/PhysRevB.81.180510

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.

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