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Evidence for nodes in the superconducting energy gap of the skutterudite compound PrOs4Sb12

✍ Scribed by M. Nishiyama; T. Kato; H. Sugawara; D. Kikuchi; H. Sato; H. Harima; G.-Q. Zheng

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
119 KB
Volume
378-380
Category
Article
ISSN
0921-4526

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✦ Synopsis

We report NQR measurements in the filled-skutterudite compound superconductors PrΓ°Os 1Γ€x Ru x Þ 4 Sb 12 Γ°x ΒΌ 0:1; 0:2Þ. Upon replacing Os with Ru, the spin-lattice relaxation rate 1=T 1 becomes proportional to temperature (T) at low temperatures far below T c , and the magnitude of Γ°1=T 1 TÞ lowΓ€T increases with increasing Ru content. These results indicate that a finite density of states are induced at the Fermi level by the impurity, suggesting that there exist nodes in the gap function of PrOs 4 Sb 12 .

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Positive local magnetization in the supe
Positive local magnetization in the superconducting state of PrOs4Sb12
✍ Shigeru Kasahara; Kazuto Hirata; Tsuyoshi Tamegai; Hitoshi Sugawara; Daisuke Kik πŸ“‚ Article πŸ“… 2007 πŸ› Elsevier Science 🌐 English βš– 729 KB

Local magnetization measurements were performed by micro Hall-probe technique in the superconducting state of PrOs 4 Sb 12 , in which the time-reversal symmetry is broken. We have observed positive, i.e. ferromagnetic like, local magnetic induction just below the superconducting transition temperatu