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Superconductivity in the WP single crystal

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arxiv 1901.04662 v1 pith:43SUERQP submitted 2019-01-15 cond-mat.supr-con

Ziyi Liu , Wei Wu , Zhenzheng Zhao , Hengcan Zhao , Jian Cui , Pengfei Shan , Jiahao Zhang , Changli Yang
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Peijie Sun Yu Sui Jinguang Cheng Li Lu Jianlin Luo Guangtong Liu
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classification cond-mat.supr-con
keywords superconductivitytransition-metalambientmagneticpnictidespressuresingleanisotropy
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We report the discovery of superconductivity on high-quality single crystals of transition-metal pnictides WP grown by chemical vapor transport (CVT) method. Bulk superconductivity is observed at Tc = 0.84 K under ambient pressure by electrical resistivity and AC magnetic susceptibility 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 Hc2=172 Oe and Hc2\=85 Oe, respectively. Our finding demonstrates that WP is the first superconductor in 5d transition-metal at ambient pressure in MnP-type, which will help to search for new superconductors in transition-metal pnictides.

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