Superconducting Properties of the Non-Fermi-Liquid System β−YbAlB4
K. Kuga, Y. Karaki, Y. Matsumoto, Y. Machida, S. Nakatsuji
DOI 10.1103/PhysRevLett.101.137004 · Physical Review Letters
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Abstract
β−YbAlB4 is the first Yb-based heavy fermion superconductor with Tc=80 mK. Our study using high-purity single crystals reveals that strongly type-II heavy fermion superconductivity emerges from the non-Fermi-liquid state with enhanced ferromagnetic fluctuations. High sensitivity of Tc to sample purity indicates strong pair-breaking effects due to impurities, probably of nonmagnetic type, suggesting an unconventional character of the superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YbAlB4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.08 | Pressure not reported | onset |
| YbAlB4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.06 | Pressure not reported | onset |
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