Enhancing the Superconducting Transition Temperature of the Heavy Fermion Compound CeIrIn5 in the Absence of Spin Correlations
Shinji Kawasaki, Guo-qing Zheng, Hiroki Kan, Yoshio Kitaoka, Hiroaki Shishido, Yoshichika Ōnuki
DOI 10.1103/PhysRevLett.94.037007 · Physical Review Letters
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Abstract
We report on a pressure- (P-)induced evolution of superconductivity and spin correlations in CeIrIn5 via the In115 nuclear-spin-lattice-relaxation rate measurements. We find that applying pressure suppresses dramatically the antiferromagnetic fluctuations that are strong at ambient pressure. At P=2.1 GPa, Tc increases to Tc=0.8 K, which is twice Tc (P=0 GPa), in the background of Fermi-liquid state. This is in sharp contrast to the previous case in which a negative, chemical pressure (replacing Ir with Rh) enhances magnetic interaction and increases Tc. Our results suggest that multiple mechanisms work to produce superconductivity in the same compound CeIrIn5.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeIrIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.4 | Pressure unresolved | onset |
| CeIrIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | 2.1 GPa | onset |
| CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.3 | Pressure unresolved | unknown |
| CeRhIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | 1.6 GPa | unknown |
| CeRh0.5Ir0.5In5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 1 | Pressure unresolved | unknown |
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