Superconductivity in WP single crystals
Ziyi Liu, Wei Wu, Zhenzheng Zhao, Hengcan Zhao, Jian Cui, Pengfei Shan, Jiahao Zhang, Changli Yang, Peijie Sun, Yuan Wei, Shiliang Li, Jinggeng Zhao, Yu Sui, Jinguang Cheng, Li Lu, Jianlin Luo, Guangtong Liu
DOI 10.1103/PhysRevB.99.184509 · Physical Review B
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Abstract
We report the discovery of superconductivity in high-quality single crystals of transition-metal pnictides WP grown by chemical vapor transport method. Bulk superconductivity is observed at Tc∼0.8K at ambient pressure by electrical resistivity, ac magnetic susceptibility, and specific-heat measurements. The effects of magnetic field on the superconducting transitions are studied, leading to a large anisotropy parameter around 2 with the in-plane and out-of-plane upper critical fields of μ0Hc2,∥=17.2mT and μ0Hc2,⊥=8.5mT, respectively. The low value of electron-phonon coupling estimated from the normal-state resistivity and specific-heat measurements suggest that WP is a weak-coupling BCS superconductor. Our finding demonstrates that WP is the first superconductor among 5d–transition metal pnictides with MnP-type structure at ambient pressure, which will help in the search for new superconductors in transition-metal pnictides.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| WP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.84 | Pressure unresolved | midpoint |
| WP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | Pressure unresolved | onset |
| WP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.8 | Pressure unresolved | onset |
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