Electron tunneling into superconducting CeRu2

Toshikazu Ekino; Hironobu Fujii; Takao Nakama; Katsuma Yagasaki

doi:10.1103/PhysRevB.56.7851

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Electron tunneling into superconducting CeRu2

Toshikazu Ekino, Hironobu Fujii, Takao Nakama, Katsuma Yagasaki

DOI 10.1103/PhysRevB.56.7851 · Physical Review B

T1

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Abstract

The superconducting energy gap of CeRu2 has been studied by break-junction tunneling. The observed gap values 2Δ(0)=1.9–2.6 meV with Tc=5.4–6.7 K give the ratio 2Δ(0)/kBTc=4.1–4.4, indicating a strong-coupling superconductor. The temperature dependence of the gap value is in good agreement with the BCS prediction.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.7	Pressure not reported	onset
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.4	Pressure not reported	onset
CeRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6	Pressure not reported	unknown