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arXiv · 2403.11126

Observation of diamagnetic strange-metal phase in sulfur-copper codoped lead apatite

Hongyang Wang·Hao Wu·Ning Chen·Xianfeng Qiao·Ling Wang·Zhixing Wu·Zhihui Geng·Weiwei Xue·Shufeng Ye·Yao Yao
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Abstract

By codoping sulfur and copper into lead apatite, the crystal grains are directionally stacked and the room-temperature resistivity is reduced from insulating to $2\times10^{-5}~\Omega\cdot$m. The resistance-temperature curve exhibits a nearly linear relationship at low temperature suggesting the presence of strange-metal phase, and a second-order phase transition is then observed at around 230~K during cooling the samples. A possible Meissner effect is present in dc magnetic measurements. Further hydrothermal lead-free synthesis results in smaller resistance and stronger diamagnetism, demonstrating the essential component might be sulfur-substituted copper apatite and the alkalis matter as well. A clear pathway towards superconductivity in this material is subsequently benchmarked.

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Hongyang Wang, Hao Wu, Ning Chen, Xianfeng Qiao, Ling Wang, Zhixing Wu, Zhihui Geng, Weiwei Xue, Shufeng Ye, Yao Yao. 2024-03-17. Observation of diamagnetic strange-metal phase in sulfur-copper codoped lead apatite. https://arxiv.org/abs/2403.11126

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