Higher-Tc superconducting phase in Sr2RuO4 induced by uniaxial pressure
Shunichiro Kittaka, Haruka Taniguchi, Shingo Yonezawa, Hiroshi Yaguchi, Yoshiteru Maeno
DOI 10.1103/PhysRevB.81.180510 · Physical Review B
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Abstract
We have investigated uniaxial pressure effect on superconductivity of pure Sr2RuO4, whose intrinsic superconducting transition temperature Tc is 1.5 K. It is 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1.5 | Pressure unresolved | unknown |
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.2 | 0.2 GPa | onset |
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