Papers › Indications of superconductivities in blend of variant apatite and covellite

Indications of superconductivities in blend of variant apatite and covellite

25 Jun 2024arXiv:2406.17525links table onlyarchive 2025-07-28

Hongyang Wang, Yijing Zhao, Hao Wu, Ling Wang, Zhixing Wu, Zhihui Geng, Jiewen Xiao, Weiwei Xue, Shufeng Ye, Ning Chen, Xianfeng Qiao, Yao Yao

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Through heavily doping sulfur into an apatite framework, we synthesize a new blend mainly comprising variant apatite and covellite (copper sulfide). Magnetic measurement exhibits that significant diamagnetism appears at around 260 K and drops dramatically below 30 K implying coexistence of two superconducting phases. The upper critical magnetic field is larger than 1000 Oe at 250 K. Electric measurement manifests that the current-voltage curves deviate from the normal linear lineshape suggesting the presence of zero-resistance effect, and the critical current is around 50 μA at 140 K. These exotic magnetic and electric features strongly indicate these two components, variant apatite and covellite, individually trigger two superconducting phases at near-room and low temperatures.

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