Superconductivity at 12 K in La2IOs2: A 5d metal with osmium honeycomb layer
Hajime Ishikawa, Takeshi Yajima, Daisuke Nishio-Hamane, Shusaku Imajo, Koichi Kindo, Mitsuaki Kawamura
DOI 10.1103/PhysRevMaterials.7.054804 · Physical Review Materials
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Abstract
We discovered superconductivity at Tc = 12 K in a layered compound La2IOs2 with an osmium honeycomb network. Despite heavy constituent elements unfavorable for a phonon mediated mechanism, Tc is the highest among lanthanoid iodides made of lighter elements such as La2IRu2 with Tc = 4.8 K. Electronic anomalies are observed below 60 K similar to those observed in La2IRu2 below 140 K. La2IOs2 is a layered 5d electron system providing a platform to investigate the interplay between the electronic anomaly, superconductivity, and strong magnetic field.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2IOs2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | onset |
| La2IOs2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | onset |
| La2IOs2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | onset |
| La2IRu2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.8 | Pressure not reported | unknown |
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