Observation of diamagnetic strange-metal phase in sulfur-copper codoped lead apatite
| Autor: | Wang, Hongyang, Wu, Hao, Chen, Ning, Qiao, Xianfeng, Wang, Ling, Wu, Zhixing, Geng, Zhihui, Xue, Weiwei, Ye, Shufeng, Yao, Yao |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 12 pages, 4 figures |
| Databáze: | arXiv |
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